Alot of religious people try to teach others their beliefs, i assume, because they want others to share in something they think is good.. alot of non-religious people (like myself) try and argue against religion because they, or we, want everyone to live their life how they want to live it, not how a religion wants them to live it.. its a win-win and lose-lose situation at the same time.. both sides are happy with their beliefs, but both sides want others to share in their happiness..