1. You mean, it started during the Protestant Reformation with/by de-frocked Catholic priest Father Martin Luther.
2. Yes, it is, a tradition of intense hatred. Perhaps it was started by Cain.
3. Of whom might his "interesting company" be comprised? I'm curious.
Luther of course, Calvin, Knox, John Wesley (yes, really, and quite vicious). Lots and lots of eminent Britons of the “Age of Reason”, and hordes of Frenchmen. And the usual political suspects, including nearly every European leftist and liberal and avant-gardist of the 19th-20th century. Everyone from Garibaldi to Luis Bunuel.