Their point was that violence is sometimes justified, using the French Revolution as an example. I'm pointing out that the FR wasn't just a matter of "killing the rulers". Many, many people were killed. It wasn't such an unambiguous good as they seemed to be implying. Also, other countries have transitioned to democracy without such bloodshed.
It's just not helpful to the conversation
"If we don't put the brakes on this car it's going to go off the cliff!"
"Historically, cars falling off cliffs was horrible for all the passengers involved."