Everyone has heard the saying that one should never discuss religion or politics at the dinner table. As Sohrab Ahmari learned, it’s unwise to discuss one’s forthcoming religious conversion on Twitter, too.

On July 26, 2016, a month after Ahmari began studying to enter the Roman Catholic Church, Jacques Hamel, an elderly Catholic priest in Normandy, was murdered by two men who pledged allegiance to ISIS while he was celebrating Mass.