I don’t deny that the old “gods” are real. They were real, only they were lesser beings created by God most high. They rebelled and sought to undermine God by pretending to be worthy of worship when in fact they too were created beings.
“For they exchanged the truth of God for a lie, and worshiped and served the creature rather than the Creator, who is blessed forever. Amen.”
â€â€Romans‬ â€1‬:â€25‬ â€
The Roman and Egyptian pantheons, the Norse Gods, etc.- they were real, possibly even the same beings just rebranded.
As far as Christmas and other holidays, those aren’t necessary to be a Christian. When Christianity spread to different areas and became dominant, they often took local customs and Christianized them. But they aren’t part of the religion. Since Christians don’t even celebrate Christmas because of the pagan origins.