Most wars are about religion which is basically 2 sides fighting over who's got the biggest imaginary friend.
I'm not religious and am completely hypocritical because I got married in a church but what I am is tolerant of people's beliefs. If they want to believe in a bloke called Mo, a hairy hippy called Jesus or a fat bloke called Buddha that's up to them but to me anyone who needs religion is weak minded. It's that they want to live by a set of rules but they need to believe in something.
Religions of all kinds preach that we should be tolerant of each other, love our neighbours and generally be nice people so why don't we scrap all religions and just be nice to each other?