The malice of a true Christian attempting to destroy an opponent is something unique in the world. No other religion ever considered it necessary to destroy others because they did not share the same beliefs. At worst, another man's belief might inspire amusement or contempt—the Egyptians and their animal gods, for instance. Yet those who worshipped the Bull did not try to murder those who worshipped the Snake, or to convert them by force from Snake to Bull. No evil ever entered the world quite so vividly or on such a vast scale as Christianity did.

The malice of a true Christian attempting to destroy an opponent is something unique in the world. No other religion ever considered it necessary to destroy others because they did not share the same beliefs. At worst, another man's belief might inspire amusement or contempt — the Egyptians and their animal gods, for instance. Yet those who worshipped the Bull did not try to murder those who worshipped the Snake, or to convert them by force from Snake to Bull. No evil ever entered the world quite so vividly or on such a vast scale as Christianity did.

Nature never prompted a loving mother to throw her child into the Ganges. Nature never prompted men to exterminate each other for a difference of opinion concerning the baptism of infants. These crimes have been produced by religions filled with all that is illogical, cruel and hideous. These religions were produced for the most part by ignorance, tyranny and hypocrisy. Under the impression that the infinite ruler and creator of the universe had commanded the destruction of heretics and infidels, the church perpetrated all these crimes: Men and women have been burned for thinking there is but one God; that there was none; that the Holy Ghost is younger than God; that God was somewhat older than his son; for insisting that good works will save a man without faith; that faith will do without good works; for declaring that a sweet babe will not be burned eternally, because its parents failed to have its head wet by a priest; for speaking of God as though he had a nose; for denying that Christ was his own father; for contending that three persons, rightly added together, make more than one; for believing in purgatory; for denying the reality of hell; for pretending that priests can forgive sins; for preaching that God is an essence; for denying that witches rode through the air on sticks; for doubting the total depravity of the human heart; for laughing at irresistible grace, predestination and particular redemption; for denying that good bread could be made of the body of a dead man; for pretending that the pope was not managing this world for God, and in the place of God; for disputing the efficacy of a vicarious atonement; for thinking the Virgin Mary was born like other people; for thinking that a man's rib was hardly sufficient to make a good-sized woman; for denying that God used his finger for a pen; for asserting that prayers are not answered, that diseases are not sent to punish unbelief; for denying the authority of the Bible; for having a Bible in their possession; for attending mass, and for refusing to attend; for wearing a surplice; for carrying a cross, and for refusing; for being a Catholic, and for being a Protestant; for being an Episcopalian, a Presbyterian, a Baptist, and for being a Quaker. In short, every virtue has been a crime, and every crime a virtue. The church has burned honesty and rewarded hypocrisy. And all this, because it was commanded by a book — a book that men had been taught implicitly to believe, long before they knew one word that was in it. They had been taught that to doubt the truth of this book — to examine it, even — was a crime of such enormity that it could not be forgiven, either in this world or in the next.

That many good men have believed this strange fable [Christianity], and lived very good lives under that belief (for credulity is not a crime) is what I have no doubt of. In the first place, they were educated to believe it, and they would have believed anything else in the same manner. There are also many who have been so enthusiastically enraptured by what they conceived to be the infinite love of God to man, in making a sacrifice of himself, that the vehemence of the idea has forbidden and deterred them from examining into the absurdity and profaneness of the story.

It was even possible for the most venerated patriarchs of the Church, like St. Augustine and St. Thomas Aquinas, to conclude that heretics should be tortured (Augustine) or killed (Aquinas). Martin Luther and John Calvin advocated the wholesale murder of heretics, apostates, Jews, and witches. You are, of course, free to interpret the Bible differently—though isn't it amazing that you have succeeded in discerning the true teachings of Christianity, while the most influential thinkers in the history of your faith failed?

Christians slaughtered Christians by the millions to defend slightly different interpretations of the religion of love and compassion.

Why should a Christian hesitate to kill a man that his God is waiting to damn? Why should a Christian pity an unbeliever—one who has rejected the Bible—when he knows that God will be pitiless forever?

Our extant ecclesiastical histories are manifestly falsified, and what truth they contain is grossly exaggerated; but the fact is certain that in the time of M. Antoninus the heathen populations were in open hostility to the Christians, and that under Antoninus' rule men were put to death because they were Christians.

Now, I appeal to the consciences of those that persecute, torment, destroy, and kill other men upon pretence of religion, whether they do it out of friendship and kindness towards them or no? And I shall then indeed, and not until then, believe they do so, when I shall see those fiery zealots correcting, in the same manner, their friends and familiar acquaintance for the manifest sins they commit against the precepts of the Gospel; when I shall see them persecute with fire and sword the members of their own communion that are tainted with enormous vices and without amendment are in danger of eternal perdition; and when I shall see them thus express their love and desire of the salvation of their souls by the infliction of torments and exercise of all manner of cruelties. For if it be out of a principle of charity, as they pretend, and love to men's souls that they deprive them of their estates, maim them with corporal punishments, starve and torment them in noisome prisons, and in the end even take away their lives — I say, if all this be done merely to make men Christians and procure their salvation, why then do they suffer whoredom, fraud, malice, and such-like enormities, which… manifestly relish of heathenish corruption, to predominate so much and abound amongst their flocks and people?

"Some religions actually go so far as to label anyone who belongs to a religious sect other than their own a heretic, even though the overall doctrines and impressions of godliness are nearly the same. For example: The Catholics believe the Protestants are doomed to Hell simply because they do not belong to the Catholic Church. In the same way, many splinter groups of the Christian faith, such as the evangelical or revivalist churches, believe the Catholics worship graven images. (Christ is depicted in the image that is most physiologically akin to the individual worshipping him, and yet the Christians criticize "heathens" for the worship of graven images.) And the Jews have always been given the Devil's name."

There were honest people long before there were Christians and there are, God be praised, still honest people where there are no Christians. It could therefore easily be possible that people are Christians because true Christianity corresponds to what they would have been even if Christianity did not exist.

Christians have abused, oppressed, enslaved, insulted, tormented, tortured, and killed people in the name of God for centuries, on the basis of a thelogically defensible reading of the Bible.

The conduct of some professed Christians is so lacking in kindness and courtesy that their good is evil spoken of.

... these men, though there was little of saintliness in their character, had a religion, and fought and suffered for it. It was a religion not wholly unlike that of the later Orangeman, a Protestant compound, made up of fervid patriotism, a varied assortment of hates, a rough code of morals, and an unshaken trust in the providence of God. To the heathen they brought not peace but a sword. To the Pope, whom they named with the Turk and the Devil, they wished destruction. For Queen and Country they would go anywhere and attempt anything.