Is Christianity based on older myths?

[Fidel_Castronaut]

Nah.

1: There aren't very significant similarities between Mithras/Osiris and Jesus

So? That there are some is enough to raise doubts, even without dissecting in totality the myths of both characters.

2: The Egyptian religion was enforced by the state, same with many other religions, while Christianity grew despite the state.

So? Relevance?

3: Jesus was a real person, there is practically no debate amongst scholars of antiquity.

Remains to be evidenced to a degree i'm willing to accept

Even if taken as given that Jesus was real, there's a long way to go following that to prove that this character was 'divine' or in any way supernatural. Again, no evidence has ever been presented to perusade me this is the case.

Even if we were to exclude the Biblical sources, there are many others such as Tacitus et al. This before we even try to explain the rapid rise of Christianity if there were no Christ.

There were no mentions of Jesus in any contemporary works during the time Jesus was supposedly alive and kicking. I'd expect someone so magical and supernatural to have at least warranted one contemporary reference to him whilst he was around.

The debate is effectively moot anyway because even if Jesus was the most evidenced person in the history of humanity, it wouldn't make a jot of difference to claims over his supernatural powers. The bar of evidence is set much, much higher for that.