You might want to do some more research.

I'll address just two points.

The Christmas tree likely came from the Christian reformer Martin Luther who may have been the first to put lit candles on an evergreen tree. This may go back to the tree of paradise from medieval mystery plays, which were Christian.

"Father Christmas or Santa Claus: He is a mashup of the tale of the Turkish Saint Nicholas and the German, Kris Kringle or the Dutch, Sinterklaas."

Actually, I believe these all go back to Saint Nicholas who you mentioned, a Christian saint.