The persecution of Christians, Ahmadis, Yazidis, Bahai — and Shiites — is far too common in the Islamic world. We should speak up about it.

Third, the Islamic world contains multitudes: It is vast and varied. Yes, almost four out of five Afghans favor the death penalty for apostasy, but most Muslims say that that is nuts. In Indonesia, the most populous Muslim country in the world, only 16 percent of Muslims favor such a penalty. In Albania, Azerbaijan, and Kazakhstan, only 2 percent or fewer Muslims favor it, according to the Pew survey.

Beware of generalizations about any faith because they sometimes amount to the religious equivalent of racial profiling. Hinduism contained both Gandhi and the fanatic who assassinated him. The Dalai Lama today is an extraordinary humanitarian, but the fifth Dalai Lama in 1660 ordered children massacred “like eggs smashed against rocks.”