It's a mixed bag. I think religion in general is far less benign or harmless than most people seem to think it is, and I think many of the perceived advantages would exist with or without religion. People are perfectly capable of finding common cause and community and refuge together; there's nothing about theism that inherently is required to do that. All you need is a shared experience and/or identity to gin that up, and if people only realized they all share their humanity and the human condition that would suffice. And one reason they don't realize that is because of the tribalism and sectionalism that religion engenders.

I can't think offhand of any good that religion bestows upon humanity that has minimal bad side effects and can't be done some other way, but I'm willing to be regaled with suggestions if anyone has them.