Curious, but why do you care? I simply don't attend concerts I am not interested in. They have as much right as any other festival or musical act. I've been attending KI since year 2 and haven't been able to justify attending any concert there, Christian or otherwise, when I come for the rides. However, many people enjoy this kind of activity and it seems to make money, so I have no issue with it. To add to this, I would also be ok with a Muslim themed concert or any other religion, for that matter.