IMHO, religion is bad to its very core. If there is one good that comes from religion it is consolation for people who are paralyzed with fear of dying... but then again I really don't think it's healthy or conducive to society for billions of people to be deluded either. If religion must exist, I think it should be an entirely private, individual matter. Yeah, go to church and read your Bible and pray if you want but don't try to spread it around (and I understand that this goes against everything the Christian Bible says, so... call it wishful thinking).
After I became an atheist, I felt like I had been played/controlled/manipulated/brainwashed/et cetera by religion. It exists to propagate itself, in order to control people. (I suggest reading "The God Virus" by Darrel Ray for more on this).
"Religion is regarded by the common people as true, by the wise as false, and by rulers as useful."