It happened because the Christians pagerized the Hebrew faith, re-interpreted all the OT, created Satan and Hell as they tout it, and required salvation from that.

IF you look at ROME, after Nero and before Constantine you find this odd period of time where the Christian Faith was allowed to bloom, where known hebrew authors were adopted by the Royal family and the glaring oddity that side by side comparisons of the writings of tthis author are remarkably similar to Mark, the first Gospel from which Matthew and Luke were plagerized or inspired.

THEN Constantine took the Religion full Roman . . .

@Davesnothere That's about the size of it... But I'm missing something from your reply -- who is it that parallels Mark? Are we talking about the Q document? And i hope we all can enjoy the irony of having a civil, very informed discussion of Biblical Criticism on an Agnostic/Atheist site.

@andygee Both Matthew and Luke are derivitive of Mark.

I was touching upon the Flavin Theory, which is in short summary as follows.
Rome was very fed up with an endless parade of zealots from Judea, constantly starting revolts and uprisings. To counter this, they invented a NEW Messiah, one who did not insist one rising against Rome but instead said "turn the other cheek" one who said "render unto Ceasar the things which are Ceasars and render to God the things which are God's"
Of course this Messiah would be none other the Jesus.

Here is a link to this theory in toto.

This is a theory MUCH in dispute by believers, but it also has quite a bit of evidential support.

Being as it is antiquity, we shall never know the truth of the matter.
[postflaviana.org]