That’s funny.
I find it pretty rude to ask a question on a fairly well-documented historical topic that you could also very easily have found out with a simple Google search. Back in the day, we used to reply to people, “Let me Google that for you,” when someone asked such a low-effort question.
Your original reply strongly indicated that you were skeptical and questioning the user’s claim. There is a very large body of historical research documenting all of these things.
nomel couldn't have downvoted you (HN constraint), stop the attack. LMGTFY has a terrible rep on HN (I'd link a search, but you can easily find).