(American) Political debates are fun to have on the internet, because a few people don't really know that much about American politics or history. (Yes, history does have a lot to do with how things are run today folks.) It's fun because a few people who side with their political party think that their party can do no wrong, which by all means, is wrong.

And I can prove it, but I won't actually say "You're wrong, go die". I would actually let the person state their facts (or opinions) and then offer my counter argument.
I don't like religious debates. I find them much more close minded in general than political debates. Most people I've seen thus far will just say, "You're wrong" or something else close minded like that. Saying that "you're wrong" is never a way to fuel a debate. Unless you can DISPROVE that there is or is not a God or gods, then don't tell a religious person, or lack there of, that they are wrong.