I believe in god but I don't pretend to know anything about him. I consider myself christian in culture at the very least, and I would say I'm a supporter of the church in gwneral. I like catholics a lot, they seem like they look after their own properly. Lots of denominations are too "open" for my liking.
Even if not spiritual, a religion may serve to keep a group working together and looking after one another. Thats the real reason every town would have a church.
If they start caring more for people outside their group then I think it fails at its most important function of keeping a society united, cooperative and secure.
I expect my views are very outspoken though so it's not like I'm going around telling people their way is wrong. I just keep such opinions restricted to people who ask or in the actions I take.