Not sure I can agree here. Christianity as a basic philosophy is practiced by people who will see Romans 13 as a detail in a book full of contradictory ones. They're only going to understand as much of it as you can put in a paragraph.
Well, Romans is a very important book, it is a quick summary of Christianity for non Christians, and specially for non-Jews. It's not a lost paragraph in a lost book.
Also, I can't recall any part of the Bible praising anarchy or, as the Enlightenment proposed, social reality just as a social contract.
And that paragraph is: Blessed are the meek, for they shall inherit the earth. It's easier for a camel to pass through the eye of a needle than a rich man to enter heaven. Do what is morally right, and you go to heaven. Do what is bad, and you go to hell, even if in this life you are rich. The next life is what matters. Moral right is what matters, not moral alertness or pragmatic success. Worship God and you'll be immortal.
That's how Christianity is constructed as a virus.
Beyond the paraphrasing, the same could be said about the Baghavad Gita: Do what is morally right, and you go to heaven. Do what is bad, and you go to hell, even if in this life you are rich. The next life is what matters. Moral right is what matters, not moral alertness or pragmatic success. Worship God and you'll be immortal.
You and I know that Christianity is like a Sears Catalogue -- ten million different things mixed together, including the complete spiritual inheritance of Babylon, Greece, India, Phoenicia, Rome, Hittites, Egypt, Sumeria, Zoroastrianism, etc. In fact, they used to view Christianity as Zoroastrianism 2.0 in academia, before that became troublesome. Gnostic, transcendental idealist Christianity is in there, but much as with Judaism, it's hidden among the crap because the basic idea behind those who "owned" and may have "created" (compiled) Christianity is that of control. Wrest control from the state and transfer it to the religion.
And thus a disaster culminating in 1,000 years of fratricidal European wars is launched.
So is syncretism in History, not big deal. Nonetheless, I would give more opportunity to gnostic Christianity, even when some of it was very weird and incoherent, and less "editing".
I can certainly tell, that in this day, you can find any religion in the Sears Catalogue, if by that comparison you're referring to our contemporariness.
I don't understand your last argument, are you saying that Europeans needed Christianity to slay themselves among nations and tribes and feuds?