The first is, in my opinion, mostly media hype. Bashing Catholics has been an American past time since the Puritans first left England because of the Stuarts (and the whole losing the Civil War thing, but you know how that goes...one moment you're Lord Protector of England, next thing the Royalists are
digging your decomposing body out of the ground to chop your head off and stick it on a pike). I mean, what, 0.006% of the priests in America accused is a lot? The fact that the Catholic Church tried to defend them with all its power was upsetting, but it's hardly "child molesters inc."
As for the second, well, better divisive among the opposition than among the allies, yeah?
EDIT:
Oh, gods, you cannot believe that. You seriously cannot believe that the
Catholics were behind Salem. Heck, the Church didn't really get into witch hunts in general for some time, because according to canon law, just believing that witches existed was heresy until around the 15th century and the Inquisition looking for new targets. Very little of it, to be perfectly honest, was directly Church, but just...people being petty, self-absorbed, greedy...basically, people being people. Very rural regions, very turbulent regions...these tended to have the worst, and civil authorities tended to be just as bad about it. Same with Ireland. The IRA (Catholic) and the Unionists (very much
not Catholic) fight quite a bit, and both sides share equal blame. As for the last...oy, I shalln't even touch it.
Purely anecdotal, but I love the story about the Catholic priest who went to a village in northern Galicia (Leon?), took over the witch-hunts from the secular authorities, and proceeded to find everyone accused innocent due to lack of proof. It just turns so many Hollywood assumptions on their heads.