Down here in the Bible belt Catholics certainly are equated with Mormons by the Evangelicals. Neither are considered "Christian" and neither are considered to be "going to Heaven".
When since did God appoint these bible belt evangelicals to decide who's going to heaven?
I don't live in the Bible belt, but I've never met a Christian that said all Catholics are going to hell. If I did, I'd doubt he really understood his faith.
Catholics have some beliefs I disagree with, but no fair minded student of the scripture can say that they are for certain going to hell. That's just judgemental, legalistic nonsense.