I would like to posit an answer to the original post/topic.
I think that very few Protestants “hate” Catholicism and almost none “hate” individual Catholics. Even Jack Chick, who is about as fundamentalist as you can get, says he doesn’t “hate” Catholics, but wants for us to be “saved.” (My Savior is a Jewish carpenter, not an American comic-book artist, but anyway.)
It’s all a big misunderstanding plus a heavy dose of fear, which is the enemy’s favorite weapon. The big misunderstanding is that “Catholicism is not biblical.” There’s a certain
Catholic apostolate that has thoroughly debunked that myth, and anyone who seriously studies the Bible will arrive at the conclusion that Catholicism is
thoroughly Biblical. So, but for the fear, this misunderstanding would not exist.
How did fear enter into the equation? The devil put it there, and the way he does so is by distorting our minds, so that Catholicism seems to be a
foreign “Other” to Protestants,
and vice versa. Humans have a natural inclination to distrust anything that is “foreign,” and this fear is called
xenophobia. Half of Catholic apologetics is defending Catholic teaching, but the other half is destroying the fear that divides us. This fear is what keeps Protestants and Catholics from seriously studying the Bible and the shared history of Protestantism
and Catholicism so as to reconcile the differences between our communities.

Let us pray that all Christians who have charge in their communities will receive divine grace to overcome this and all fear, and that the Lord will protect us from all anxiety.