Personally, I think it's wrong to espouse beliefs you don't actually believe, and by joining a church, you are saying that church's beliefs are yours, although not necessarily all of them. It's ok to disagree with some things your church seems to stand for, because I think it would be hard to find two people who believe exactly the same thing in the same way on all things.

I'm not sure of the laws regarding discrimination of religion in terms of religious schools. You might ask a lawyer.

My boyfriend went to several churches before deciding on one. I, on the other hand, don't belong to a church, and don't have a religion. But he might know about the tithing thing...he's not here, or I'd ask him for you now. I'll try to get info and post tomorrow.

I don't think you should join a church you don't feel comfortable in, though.