Hmmmm... it would seem to me that if you ostracize a non-believer, you are failing miserably at the whole "do unto others" mandate - Jesus never said, only if those "others" believe in me.

I think, the issue is in the difference between being "religious" and being "spiritual". There are many religious people who are not spiritual (they go through the motions, but don't actually feel it in their hearts), and vice versa. My aunt is a religious fanatic who made her children pray two rosaries a day... it did not stop her from threatening her son with throwing him out for impregnating his girlfriend when he said he did not want to marry her, and later ostracizing the grandchild.

The most important thing about going to church is not actually that your body is there, but that you are nourishing your soul. God is in everything that is good, so if you are moved to do something good, that is the will of God, and I will see God in you... whether you choose to see him yourself or not,