Where's your historical proof. Let's see documentation.
The difference is that Catholics are not up in arms about the presence of Baptists. There are no Catholic websites dedicated to proving that Baptists are evil, or trying to control the world. I've never met a Catholic who said: "I really hate those Baptists, they aren't REAL Christians". I don't know what your personal hangup is with RC, but it smells like spiritual juvenilism. If ye love Christ, focus on that most important thing, for then you shouldn't have time left over to hate those who love Christ under a different roof.