Are christians prejudice?(ATHEIST/CHRISTIAN)?

people have beliefs but we can all agree that we don't know FOR SURE were we go when we die. Yet with christians saying ATHEIST YOU ARE GOING TO HELL or HOMOSEXUALS ARE GOING TO HELL saying it like it's a fact. When no one on earth is really sure what happens when we die. Also thinking that Christians get the heaven and the rest get the hell because they are oh so Superior

I know I'm going to get some rude answers and some non agreeing answers but please try to be mature or else your just a waste of a person going around making mean comments all the time