Barring a miracle I think the battle for christanity in Europe is lost. The church should be salvaging and abandoning the churches, and selling the land (not to the muslims). Considering a hostile climate, low birth rates among native catholics, and the an increasingly hostile presence in Europe both political and otherwise the Holy See itself may have to be moved in fifty years or less.
It is a retreat and there isn’t a nice way to dress it up. The church can’t fight back now due to the political climate and when it finally has to it will lose in Europe. All they can hope to do is wait for the muslims to kill eachother and begin to expand again.
They may need to move to South American but then again its only a matter of time until their laziness and love of socialism makes them turn on the church.
This is almost certainly the end of civilization. It’s not a matter of if but when.
The first Muslim nuclear armed country will be France.
Not Iran.