Religion

the superficial, story line level. Truth, as is written, is in the parables, which I guarantee are not understood at all. There's a reason there's a hidden level for those who actually care about spiritual development and a superficial level for those not ready to commit. However, as Paul indicated, the purpose of the teachers was to get from point A to point B, not sit at point A forever and think that's all there is.

Constantine's convention resulted from his desire to stop the fights and bickering between the different sects. So, the different theological views were there already. This probably resulted after Rome kicked anything Jewish out of Jerusalem and those people could no longer be there to guide the movement. Actually, the weakening of the Jerusalem pillars may have begun earlier with the death of James.

Modern churches don't encourage an honest look at Christian history. They don't want people to know that there never was one main, true church which the pesky heretics polluted. They don't want people to know that paleography shows that the writings in the East were more heretical (Gnostic) whereas Western writings reflect a belief based on the outward story line. So, guess which sect must've written the gospels... cannot have been Orthodox theology since there's a hidden theology in the parables.
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But going back to Peter vs Paul. Peter was schooled in Jerusalem, not Rome, so Rome claimed to know his secret teachings. If so, those secrets have been kept hidden... provided you can't understand the hidden-in-plain-sight theology in the parables. As for Paul, his letters weren't used by the Orthodox for the first 150 years because the Gnostics claimed him as their apostle... and Paul operated under the forbearance of James and Jerusalem.

The true Christianity has been lost for about 1800 years, and we can look at the Church's 1800 years of violence, corruption, hypocrisy, bigotry, false values as evidence of a materialistic message rather than a spiritual one.