Lots of thoughtful comments here, but I still think this is a silly thread. By all means, Deckman, if you are not comfortable walking through the doors of a church, don't. If performers want to schedule a concert in a church, that is their perogative, regardless of what you think they should or shouldn't do. (your statement: Performers should consider,carefully, the social implications of performing in a "church.")
People are certainly entitled to their own opinions, especially when those opinions have no impact on what someone else may think or do. One of the big problems we have today occurs when people have one opinion and think others should follow suit. I don't get what possible objection you could have to people gathering to hear a performance in a church while you sit at home. How have they affected you?