In France, we have laïcité, which means that atheism is almost our state religion. But I think a very important part of Western culture is in the centuries when Christianism was dominant and was present in almost all works of art - not only liturgical works, but also literature and music. Yes, it's important to have that in our present. It doesn't mean that people have to adhere to a dogma or practice a religion, but it's part of our heritage, and you have to at least try to understand it. Otherwise you can't be a modern person.