The Church doors can be constantly repaired. This was not intended and is an oversight. The ability to repair the door will be removed completely.
OPs team put banners and multiple engineers constantly repairing the door inside the church and made the Church unbreachable. This stalemate was kept for a long time. At the time that the moderator took action there was 1 minute and 30 seconds left on the timer, the moderator spawned inside the church and could not destroy the door, so after the warnings he thinned out the engineers. The attackers did manage to take the point but OPs team won the match on the next objective.
Whoever spawned inside the church via the banners could not leave; technically that also makes it banner griefing.
People in the match were complainin about the stalemate, and were thankful about the resolution.
The people that complained were the engineers.