Jesus wasn't born on December 24th, Mithra and others were (so the stories go). Jesus was born when the shepherds were out in the fields, after Spring and the grasses had grown, not during the middle of winter.
As far as passover, "good" Friday, Easter, etc? Judaism comes from Paganism as well. The Talmud comes from Babylon, a Pagan area. Yahweh was a Pagan god elevated to the One. The Torah comes from the Talmud and the Talmud comes from the Torah. But, they originated with Pagan beliefs. This is why the Talmud is always referred to as the "Babylonian Talmud". It is Pagan in it's roots.
The Romans had a Mithra cult and (IMO) the Mithra that came from Zoroastrianism and the Persians. Mithra too had 12 deciples and was resurrected after 3 days, etc. But, Mithra was around way before Jesus. And, Jesus never fulfilled the prophecies of the Hebrews.
Yes, there was a melding of Pagan tradition with what the church. But, I've never seen a Monotheistic religion that didn't have it's roots in Paganism, ever! They don't exist. Even Zoroastrianism, which I believe was the first Monotheistic religion, had it's roots in Paganism.










