How is Christianity legitimate?

It's not. It's a usurper.

Christianity is a fable created 2000 years ago, then made the only legal religion of the empire, under pain of death, enforced by fire and sword for 1500 years. It's about the saddest part of human history ever.

Christianity is based on the spiritual orb phenomenon, Hellenistic Judaism, and the Jungian archetype.

Where there is no truth , there is no GOD . Jesus taught us that the most loved (mainstream) churches are an enemy of GOD . This could not be more true than today.

you have to licence to practice if you are a church that makes us legal through the government

I guess, beyond the homosexual prohibitions (of course), you have not read much of the Bible. Jesus told his apostles to go out and baptize all nations. Doh!

By the fact that there are so many believers- if Scientology has as many believers as Christianity has, you would see Scientology become legit and try to push Xenu-based creation studies into public schools and public officials bow and knell before whoever the pope of their cult is.

Are you suggesting it's illegitimate?

While God & Mary weren't married, I don't believe the regular rules of legitimacy apply to immaculate conception.

God has set his seal of approval upon it. Study the Bible and pray.

its only legitimate because of the way history has preserved it,