Is there any way back to Christendom?

Maybe. Conquered Spain tried it and finally succeeded after 7 continual centuries of hand-to-hand combat with the dominant, militant Islamic culture.

Remarks Robert Spencer, "The worst aspect of the cultural and civilizational suicide of Britain is that it didn't happen through conquest. When the Normans were victorious in 1066, at least the natives put up a fight. They were defeated, but they had nothing to be ashamed of. Now, the leftist political elites, in pursuit of short-term electoral gain and long-term socialist internationalism, have surrendered the nation without a shot being fired. Tony Blair and David Cameron and Theresa May and Boris Johnson and Rishi Sunak and Keir Starmer and their friends, allies and henchmen will be remembered as perpetrating the greatest betrayal in human history outside of the actions of Judas Iscariot."