I think the anti-Mormon rhetoric is certainly excessive, but regarding the comparison here, it's definitely worth pointing out that JFK was never a Catholic bishop.
Fair enough.
Religious leadership is expected to have a somewhat higher moral standing than average members. I believe this should be the emphasis of the opposition instead of "he is part of a religion that believes in lazer underpants!!!!!!HURR!!!!"
That isn't to say that I agree with all the criticism in this thread. I mean good god people, if you don't like Mitt Romney because he's a Moron don't vote for him. It's really that simple.