A coalition of prominent evangelical leaders published an open letter yesterday condemning Christian Nationalism. I wrote a short piece on it yesterday evening for The Square , the blog for the Religion and Its Publics project that I edit. In general, I think the letter is admirable, and I like how the writers wield the charge of heresy against the Capitol insurrectionists. I was, however, disappointed to see who did not sign the letter. I also think the statement raises the interesting matter of whether it is appropriate to question the sincerity and legitimacy of people's religious beliefs. After January 6, perhaps yes.