I think religion is related to traits humans evolved while surviving. It can be great for social cohesiveness, and prior to our more modern discoveries (Of evolution and a bunch of other stuff) it helped many people with the irritation of not knowing what was really happening.
I also think that religion can't be destroyed because the impulse is too strong for too many people. I think it's better to concentrate on critical thinking, because when people can reason they are less likely to ignore important scientific evidence. Or burn people to death as witches.