It is only a building, and the group putting on the concert is usually an outside organization.

This is hardly a new trend here in the U.S.   If it wasn't for churches, I think it would have been a struggle for folk music to be heard for the past couple of decades in the U.S.   Churches have provided "listening rooms" for folk music. It beats bars - you don't have to put up with drunks who only want to watch the game on a TV screen. Because many churches either rent for a low price, or offer the room for free in many cases, it has enabled groups to organize and present great music. I've rarely heard of churches interfering with the kind of music presented.

Unitarian churches have often been a major outlet.   I'm not religious at all, but I'm thankfull that churches have been there when the coffeehouse circuit and other venues dried up.