I really don't believe it is any easier in general to convert a Protestant to Catholicism *snip*
For real; Lord knows I've tried with my wife.
I really like vonGenf's idea, by the way. It makes sense in a historical context as well; with Islamic nations racing forward in terms of conquest, many Christian churches and cathedrals were rededicated into mosques. The Hagia Sophia in Istanbul is a prime example, though it is toward the tail end of "period". How hard would something like that be to implement?
