On April 11, 1649, the Catholic Church held an auto-da-fe in Mexico, the largest such event ever held in the New World, in which 13 people convicted of “Judaizing” were executed, their bodies then burned along with the remains of 57 others who had died awaiting trial. They were among 109 convicts punished in the day’s auto-da-fe, all but one of whom had been tried on grounds of...