I have read them, and I don't believe it. Any group willing to oppose shareholder capitalism, crony capitalism, "white" supremacy, fascism, etc., is good, not evil.Why don't you read the articles from the recent ANTIFA Raleigh/Durham riots where both political and BLM leaders locally are calling out ANTIFA as both the problem and violent, evil people.
It would be interesting to go back and look at original documents, like journals, pamphlets, newspapers, and see what monarchists had to say about American revolutionaries. I'd bet it sounds much the same as the criticism you're parroting. I say this with some confidence, because I've seen what was written about immigrants by the anti-immigrants during a couple of anti-immigrant times in our history. It all sounds the same.