There's a reason why the Pope didn't visit the U.S. until the sixties.

Did you know official Catholic doctrine towards Protestants described them as heretics and therefore should be burned at the stake until 1959?

Of course the Church hadn't been practicing that policy for years but it was still there nonetheless.

Anti-Catholic sentiment in the United States and England stems from years of threats and abuse from the Church and majority Catholic countries. Think of Spain trying to invade England in 1588, or King Louis XIV revoking the Edict of Nantes putting thousands of Huguenot Protestants at risk. Many immigrants to the United States were persecuted Protestants from Germany.

Obviously both sides have committed atrocities towards the other. No one side is innocent, but anti Catholic sentiment is not without its roots from very bloody times.

Moe you have to realize that much.