You have to kill the monarchy and the “nobles” and structures that support it. It’s like a cancer.
The French revolution probably couldn’t have happened any other way. It could have been avoided if the King and his followers accepted that it was over and did not try to hold on and reestablish power.
That's what you're saying. No matter what kind of governing entity, each in their special way are potentially your cancer. No need to single out monarchs, nobles, or God, for that matter.
After the Napoleonic Wars, Louis XVIII was put on the throne and only proved they got it right about the Bourbons the 1st time.
That smacks of Lenin and Pol Pot, like modern lefties saying we need to purge the rich. Granted the idea of hereditary social privilege via being noble is absurd, there were nobles of mant degrees and thousands of them were willing to accept reform. Many such as Lafayette supported the revolution before it spiralled into irredeemable madness. To predicate reform upon the blanket slaughter of people for their status by birth is equally absurd as letting them rule because of that same status.