It was just a joke, son. You know: ha, ha; bust some chops?
Maybe the protestants were concerned about another papist ascendancy and another inquisition. Did I read that today's Pope considers all non-C's as hell-bound?
Today we just shrug that off, but in Paris, La Rochelle and elsewhere in the 16th century, such words would fill the canals and streets with bodies.
I'm not saying it's right or enlightened, but it could be a factor.