You got it part right. What you missed is that the pine was used in pagan winter solstice festivals before Christianity got within a thousand miles of the place, hundreds of years earlier.
Actually I know a Loki worshiper. I don’t know if she puts of a tree. One of my Jewish friends likes to put up a tree, all white and blue lights.
The fact of the matter is the primary symbols of Christian celebration of Christmas are mostly borrowed, and are still shared. They really ARE holiday trees, whether you’re willing to admit it or not.
Pine is used everywhere, everyplace.
It makes as much sense to consign pine to a particular group as to consign the use of a building to a particular group.
Priests were using cedar in the time of Moses, ca1400; David,ca1000 was using evergreen in the Temple
Isaiah said, in about 700 BC, “Isaiah 60:13 “The glory of Lebanon will come to you, the pine, the fir and the cypress together, to adorn the place of my sanctuary; and I will glorify the place of my feet.”
That’s written history.