Christian evangelism - Why do you bother threatening people with a hell non Christians don't believe in?

Not all Christians are like that. I would never say such a thing. My approach would be more of can I tell you how I found love in my life? Some Christians just get a bit too hyper and scary. Don't assume we are all the same because then you are the one being judgmental. Which is probably what you say we are but that's called wrath and is one of the seven deadly sins.