There are many Churches that act basically as community centers. Those should not be taxed excessively (I think it would be wrong to ask other non-profits to pat taxes and leave the churches exempt...though I might lessen my Democratic Socialist ideals a bit since we aren't looked upon favorably in the US for our stance on taxes) because they are providing a service the local government either is in not in a position to fill or just don't want to do so.
But if we walk in the light, as He is in the light, we have fellowship with one another, and the blood of Jesus, His Son, purifies us from all sin.