Paul said he was all things to all people. When paul went around different people. He changed his way to share god in a way they can understand, And, as far as scripture goes (apart from sin) became as one of them. (Ie paul did not do the same when around jews as he was around gentiles) He did not force a jew to become like the gentiles. nor the gentiles to become like a jew. He adapted.
The mainstream church wants to force everyone to adapt to them, instead of adapting to the people it is trying to reach. That is why it started to lose my generation, and has pretty much lost the younger generation fo today..