I think your problem, J., is that you expect people to think and behave rationally, and if they do something you consider damaging to others you assume they are “evil” or “bad”. There is no rational reason to be a theist, but when one is brainwashed as a child or later when one is under stress, one accepts it purely emotionally and without reason. Further, it then is inaccessible to their reason. It’s quite unfortunate, but you’d do better feeling sorry for them rather than blaming them.
I agree, in that I contribute to and support only those organizations and companies which have demonstrated views consenant with mine, economically, socially, politically, morally and religiously. Although I’ve been a member of the local YMCA for eleven years so I can use their exercise facilities, and I’m delighted that one would be hard pressed to find any religious stuff there. Recently they even changed their name to “The Y”.
I’m open about my atheism, but I don’t argue or proselytize. However, if someone tries to convert me, then all bets are off. I’ll be courteous but very strong in my arguments to point out the irrationallity of theism.
Besides, why let them get to you? It’s better for your own emotional happiness if you just shrug and let them be. 
Occam