My point is that sure, one can set this condition too, and be very strict about it. But this way they just close the ways to spread their culture. If Protestan

My point is that sure, one can set this condition too, and be very strict about it. But this way they just close the ways to spread their culture. If Protestant churches were behaving this way, they'd still have stayed in North Europe exclusively, not send missionaries anywhere, and achieved nothing.