The awesome thing about the organizations you listed to counter argue actually just prove Barbara's point more (pretty sure most of those organizations are Christian organizations anyway)! Those organizations are out directly affecting whole communities. Churches accept donations to do what...? To go where...? Why does this entitle them to reap tax benefits? We could fund a lot more of the programs that are losing money today if we started taxing churches how they SHOULD be taxed! Like everyone else! 

Just because a church preaches what you think it should preach does not mean it should hold tax exemption status.