The Roman Empire was not strictly hereditary, Flavius Honorius Augustus’ dynasty in the Western Empire was replaced before it’s fall
Yes, and the crown changed dynasties a number of times throughout England's history as well, as you are no doubt aware. Yet when the title changes families, as it often does in any feudal government, it's a heinous injustice which simply must be corrected at all costs, even if the Rightful Heir of this week himself doesn't give a shit. In fact, I believe your exact words were:
And have the rightful heirs continue to be deprived of what is rightfully theirs which they have been deprived of since 1189? Never!
So, I guess it was okay for the heirs to have what's rightfully theirs given taken away without their knowledge, much less consent, with the backing of the Church before 1189 (or 879 nowadays), but not after. Again, double standards.
and he did not have known descendants by the time the pagan European rulers converted and were legitimized. The Catholic Church was therefore the rightful successors to Flavius Honorius Augustus.
So, conspiracies to commit treason, start not just one but several blatant wars of aggression between nuclear powers and even kidnap and rape reluctant would-be monarchs are totally cool, but a bit of research is going to far? Then again, I guess I shouldn't be surprised, given your stance on the king's vassals. Double standards for the sake of blatant laziness. Yeah, you're a real inspiration to the cause, Jakey boy.