Christianity IS without question a Pagan religion.
Period. End of story. In the Biblical context, "Pagan" is just another term for "Gentile". or non-Jew.
Christianity is NOT the religion of Jesus and the Twelve Jewish men called Apostles, but rather the invention of the Pagan (Gentile) leaders of the Roman Catholic Church, NOT ONE OF THEM Jewish men. Not one.
Yes, Paul, upon whom the Christian religion was actually founded, was Jewish by birth, but Paul was a Hellenized Jew, steeped in the culture of Rome and without question a Roman Citizen, something no real Jew of the period would ever want due to the numerous conflicts between Rome and Judea.
Christianity has ALWYAS been a Pagan faith.