Needless to say that the source of many conflicts is related to religion. How should people deal with the philosophical mystery of existance? The ruling groups sure have taken advantage of it for their own ends.
Some people just assume that ethics themselves are some kind of supernatural force. But even if it is true and there is a benevolent god or gods then why should people give their devotion to such figures when there is so much senseless suffering out there?
Other groups like the Jews took a more materialist approach and many people such as Nietzsche have praised them for their superior philosophy that creates strong individuals.
Considering how much religion has been used for evil in the past by the ruling oligarchies, then how should people finally solve the philosophical mystery?