We can therefore all demand apologies from one another for mankind’s turpitude. But it is better worth remembering that we poison the present by our … - A. C. Grayling

None of the major faiths is bloodless; history reeks with the gore of their wars and persecutions, all the more disgusting a spectacle for being, in essence, as simple as this: A kills B because B does not agree with A that there are fairies at the bottom of the garden.
People should be left to believe what they like, so long as they harm no one else. Apart from normal expectations of politeness, it is not however clear why people should require their personal beliefs to be treated with special sensitivity by others, to the point that if others fail to tip-toe respectfully around them they will start throwing bombs. From a secular point of view, religious beliefs are at best absurd and at worse dangerous, and the amount of free play they are given in the public domain is a menace. Believed-in fairies should be kept at home as an entirely private matter, and their votaries encouraged to cease taking themselves so seriously that, when irritated by those who differ, they resort to Kalashnikovs. Apart from anything else, such reactions speak little confidence in their own violently-held certainties.

In one collective form of insanity, whole populations of people rise from sleep at about the same time each day, move in great herds to locations at some distance from their home territory, perform repetitive manoeuvers there, return home when evening falls, slump in front of a flickering coloured light, and after a while fall asleep again. They repeat the process day after day for decades. The disease is called “normal life”, and variations from it are regarded as eccentric; if the variations are marked enough they are even called “madness” and “delusion”.
This thought is intended to show that what counts as abnormal is a relative matter.

At the time of writing there are, by one measure, more slaves in the world than at any time in history: 27 million people all told, in forced labour camps, debt bondage, the sex industry, professional beggary, domestic servitude, and work—work without pay and under threat of violence, which is the definition of slavery—in agriculture, mining and factories. A very large proportion of them are children, many of whom are commercially trafficked….
Those who are enslaved by history—who dwell on past wrongs, who keep ancient conflicts and quarrels alive, who even seek reparations for the wrongs suffered by their ancestors—would do the world a greater service by turning their attention to present-day slavery instead. A concerted effort might open the gates of China’s forced labour camps, free the Haitian sugar-plantation slaves, rescue the child prostitutes of Southeast Asia, and end the chattel slavery in Mauritania and the Sudan where slave markets still exist and where you can buy six children for one Kalashnikov.