It should be obvious that I am admirer of the site Cathar.info. Whoever put it together has done exhaustive research and does a very good job of portraying what, or as much as can presently be know about what, Catharism was and its origins.
One of the things I found interesting was his/her discussion of three strands of original Christianity, which are said to be the Pauline strand, the Johannine strand, and the Jewish strand.
Hypotheses of this type are not new, and propose that one stream of Christianity was heavily influenced by Paul, another by the Apostle John, and the last by James, the brother of Jesus.
The Jewish strand (with James as its guiding light), which sought to preserve a more "Jewish" Jesus and Christianity, allegedly lost its base when Jerusalem was destroyed in A.D. 70 and died out over the next couple of hundred years.
The Johannine strand is seen by the scholar at Cathar.info as being the source for Catharism (and is often seen to be the source of a lot of Gnostic movements --
https://en.wikipedia.org/wiki/Johannine_Christianity).
This is contrasted by him with the Pauline strand (
https://en.wikipedia.org/wiki/Pauline_Christianity) which he sees as being the source of what later became know as Catholic Christianity.
I think I have seen other discussions where the three early strands are Hebrew, Greek, and Latin, reflecting the types of viewpoints and approaches that were characteristic to these cultures. Once again, the Hebrew/Jewish strand drops out, and the struggle ends up being between Greek ideas / philosophy (in the Neo-Platonism of the day) and the more pragmatic, control minded, and literalist Romans. The Neo-Platonist influences seem to reach their peak with the Origenists (many of whom were reincarnationist) but are eventually crushed by the Imperial power, which is (for obvious reasons) more sympathetic to the "Latin/Roman" influence. In Imperial Christianity, as I look at it, Imperial Rule and Divine Rule are mirror images, with both being absolute and all who don't toe the line being condemned and sentenced to the worst punishments imaginable by an absolute Imperial ruler. Rebels and guilty we may be, but this type of analysis does not comport with the example given in the parable of the Prodigal Son where God is not compared to a proud emperor, but to a loving father.
However, either way, the early battle ends around 500-600 A.D. with what I refer to myself as Imperial Christianity holding the field and crushing and excluding all others. The interesting thing to me is that the reincarnationist thread/strand apparently did not completely fade with the crushing of the Origenists, but apparently continued undercover and growing until it was once again a threat to the chosen orthodoxy 500-600 years later and had to be CRUSHED once again, with even more violence and ruthlessness. Nonetheless, here it is cropping up again after all of these years.
Hmmm. Well, this may have been a long (and possibly pointless) meander through history, but it seems to me that there is a message here somewhere. It seems that the Truth will come out. And God, who is a God of Truth, will make sure that no matter how many times Truth is dead and buried, it will rise again from the dead--much to the consternation of those who killed it and think it is gone for good.