From previous comments I assume you're from the UK. And I also suspect you've grown up with anti-Catholic bigotry and have assumed that this is normal.

I do understand this. My father would talk about Protestants as if was synonymous with Scum. It wasn't till my teenage years that I realized the problem with that.

You need to get rid of that shallow thinking and understand that decent and intelligent people can disagree with your personal beliefs. It will make you a better person.