"Think of the fanaticism, the endless persecutions, the religious wars, that sanguinary frenzy of which the ancients had no conception! Think of the crusades, a butchery lasting two hundred years and inexcusable, its war cry “It is the will of God,” its object to gain possession of the grave of one who preached love and sufferance; think of the cruel expul- sion and extermination of the Moors and Jews from Spain! Think of the orgies of blood, the inquisitions, the heretical tribunals, the bloody and terrible conquests of the Moham- medans in three continents, or those of Christianity in America, whose inhabitants were for the most part, and in Cuba entirely exterminated.”” ...‘“‘Perhaps I go too far in saying all religions. For the sake of truth, I must add that the fanatical enormities perpetrated in the name of religion are only to be put down to the adherents of monotheistic creeds, that is, the Jewish faith and its two branches, Christianity and Islamism. We hear of nothing of the kind in the case of Hindoos and Buddhists.”"
January 1, 1970
https://en.wikiquote.org/wiki/Arthur_Schopenhauer