Sometimes, friendship may change the world. - Massimo Introvigne

By excluding the intolerants from the scope of tolerance, Voltaire reduced tolerance to an empty box. Worse, he prepared the atrocities of the Terror of the French Revolution, which was in turn the model of Communist terror. Millions were killed by proclaiming they had no right to tolerance because they were themselves intolerant. …The dramatic mistake of Voltaire should be corrected by proclaiming that religions and philosophies have [the] right to be in different ways intolerant, and should still be tolerated.

When a national or local government calls a religious group “antisocial” [or “cultic” or “dangerous” or the like], it jeopardizes [that religious group's] right to honor and reputation, incites [unreasonable] discrimination, and interferes with the citizens’ right of deciding which religion they want to join free from governmental pressures—who would want to bear the stigma connected with joining a religion officially declared “antisocial”?

The jury is still out, but what Machiavelli described—either to recommend or subtly denounce it—was a diplomacy without conscience. It may look brilliant, but many who commented on Machiavelli noted that hidden in his works is the idea that a diplomacy totally separated from morality and conscience may achieve results occasionally but in most cases, and in the long run, would not work.
…However we decide to read him, Machiavelli listed as the three features of effective diplomacy caution, art (meaning the mastery of a number of technical tools), and above all patience.