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From what I know off the top of my head, pagans are people that worship other gods or goddesses with varying rituals and practices, pretty much an umbrella religion for the countries around the Mediterranean. I think even like the greek gods in mythology would be considered pagan as well. I could be wrong... I'll look into it more.

Ah, no. Pagans and Wiccas are not Christians from what I assume from my past experiences. It's a whole new different religion. They serve God-made idols.

Pagan is a word that basically fits every religion outside of the 3 major abrahamic religions, Judaism, Christianity, and Islam. Baha'i is TECHNICALLY abrahamic, but it involves cultural/religious influence from hinduism, so I would consider it also pagan.

Basically, that which is pagan cannot be Christian because the two words are contradictory. Don't call a Muslim or a Jew a pagan though, because it's incorrect. All three religions are Abrahamic in origin, and worship the same god (technically... though Islam represents God under a different light). For this reason, they are not pagan.