Have we ever heard of 'Christian, Jewish, atheist' terror?

The answer is yes.  But do not tell President Recep Tayyip Erdoğan. He still claims that the world is so anti-Muslim that, in his words, "only if the perpetrator of a murder is a Muslim is this called 'Islamic terror,' while if the perpetrator belongs to a different faith [his act] is not even categorized as terror." Since Mr. Erdoğan asked, "Have you ever heard of Christian, Jewish or atheist terror?" let us journalists try to help him understand. He still thinks "the perpetrator will be categorized as a terrorist only if he is a Muslim." Mr. Erdoğan is wrong.

It is not true that mankind has viciously united to blame Muslims as terrorists. Christian Americans for several decades fought the - Christian - Ku Klux Klan that targeted African Americans, Catholics, Jews and other social and ethnic minorities. In its time, Ku Klux Klan was a terrorist group.

The "Anti-balaka" groups in the Central African Republic destroyed nearly all the mosques during the years of unrest in the country. They were anti-Muslim terrorists. Tripura in northeast India and Nagaland in eastern India were groups committed to acts of terror too, motivated by their Christian beliefs. In Uganda, the Lord's Resistance Army was a violent quasi-religious movement that mixed aspects of Christianity with its own spiritualism.

During Lebanon's civil war (1975-1990) organized groups of Maronite Christian militias perpetrated the Karantina and Tel al-Zaatar massacres of Palestinian and Lebanese Muslims. They were terrorists.

The Irgun, a Zionist paramilitary organization that operated in Mandate Palestine between 1931 and 1948, was described as a terrorist organization by the United Nations, Britain, and the United States, in media outlets such as the New York Times; and...