Religion is interesting because it brings out the best and the worst in humanity. It can be a source of good deeds, whether it's people from different spiritual backgrounds coming together to help other people in need after a crisis. But it's also a cause for war and bloodshed.
As I have pointed out, it is the Christian tradition that is the most fundamental element in Western culture. It lies at the base not only of Western religion, but also of Western morals and Western social idealism.