We have the letters of Peter, and we have the Gospel of Mark which many believe is as close to Peter's version of life with Christ as we can get. Christianity did not begin at the top of the Roman hierarchy. Like with the Jews, it began among the poor. It was grassroots and the hierarchy reacted in two ways. The first was to try to uproot it. When that didn't work, it figured out a way to leash it and use its power as its own.
Well, as you know well, the letters of Peter are widely considered pseudepigraphic and all of the gospels are anonymous. The attribution of those authors came later...I want to say the earliest attribution came from Athanasius although that doesn't sound right. He was in the late 3rd century /early 4th century and there were attributions prior to that I believe. I would have to look it up but it's not really that important. What's important is that the attributions came later by whoever it was and I am pretty sure you are aware of that
I agree that Christianity didn't start at the top of Roman hierarchy. I am arguing that that's where it ended up when it gained strength, legitimacy, and authority.

I agree with your characterization, but after they leashed it, they altered it to suit their purposes and their goals. I simply don't see how anyone can deny that.
In an earlier post you said that Christianity had been Romanized, Germanized, Anglicanized, etc. You are preaching to the choir. My main point is to counter Dsir's claim that Catholicism was the earliest form of Christianity. I think that statement has clearly been established to be false on numerous fronts.
As far as granting national victories, I believe Peter, Matthew, Andrew, and Paul would point out that Gospel was not about countries getting along with other countries, it was about people getting along with other people. Jesus was not speaking to nations and rulers of nations, he was speaking of how we as individuals relate to God and to our neighbors.
I would respectfully disagree and here's why. The Messiah was thought to be a lot of things. As I know you are aware there was a lot of debate about the form in which the Messiah would come. But all of them had certain things in common and among them was that the royal line of David would be restored to the throne and foreign invaders would be kicked out of the Promised Land. Again, this was an apocalyptic belief system that was focused on God's good kingdom being established on Earth and Jews (it was a Jewish prophecy) would be free to worship God in communion with God and the Promised land would be restored. Surely you would agree that that's what the Messianic prophecies were largely about and that is what Jewish apocalypticism was unquestionably about.
So Peter, Matthew, Andrew, Philip...the whole lot of them...if they are claiming that Jesus was the Messiah, they are predicting the impending restoration of the Hebrew Empire
not the Roman Empire. Not the empire of the occupiers of the Promised Land. And certainly not the anti-Semitic form of Catholicism that emerged under certain rulers, most notably Theodosius and Justinian. The whole point of the Messiah and apocalypticism was for Jews to be able to worship freely and what emerged as official Church doctrine was strongly anti-Semitic and at times extraordinarily oppressive.
I highly doubt even Paul would go that far and Paul was certainly more open to non-Jewish inclusion than the rest of them, at least according to his undisputed epistles. And according to those letters it took some arm twisting to get the rest of the disciples to agree. I think Paul certainly argued that Jesus came of behalf of all mankind, and the gospel of John certainly backs up that argument, but the rest....I am not at all convinced. I don't think the Synoptic Gospels say that (although you could "massage" them into to saying that in certain verses), I think Revelation is clear as crystal on the matter, and I think Paul's undisputed epistles....boy I think you would really have to bend and twist them to get them to support the idea that Jesus came to bring glory to Rome, which is eventually what was being argued by Constantine, Theodosius, Constantius, Justinian, etc.
I have to respectfully dissent from your position