“You just don’t know what you’re talking about…”

That’s the part that makes it personal.

That's not a personal attack. A personal attack would be saying your a dumb reddit-brained smuglord. And an ad hominem would be saying you're wrong because youre a dumb reddit-brained smuglord.

I didnt stop at saying your wrong. I said you should investigate the people and revolutions you're talking about, because if you did investigate you would know you're wrong. That's why i said you don't know what you're talking about, because no one could have actually read about the 1917 revolution, the Chinese Revolution, or the Cuban revolution and think that they are not communist revolutions, or just "dressed up in the clothes of communism"

If you believe I’m wrong, why not try to convince me?

If you believe you're right, why aren't you trying to convincing me?

You're the one who made an assertion that is obvioulsy untrue to anyone who knows about those subjects. You made these obviously false assertions without any evidence whatsoever, but somehow the burden of proof for what you said is on me.

Selected Works of Mao Tse-tung OPPOSE BOOK WORSHIP

May 1930 I. NO INVESTIGATION, NO RIGHT TO SPEAK

Unless you have investigated a problem, you will be deprived of the right to speak on it. Isn't that too harsh? Not in the least. When you have not probed into a problem, into the present facts and its past history, and know nothing of its essentials, whatever you say about it will undoubtedly be nonsense. Talking nonsense solves no problems, as everyone knows, so why is it unjust to deprive you of the right to speak? Quite a few comrades always keep their eyes shut and talk nonsense, and for a Communist that is disgraceful. How can a Communist keep his eyes shut and talk nonsense?

It won' t do!

It won't do!

You must investigate!

You must not talk nonsense!

https://www.marxists.org/reference/archive/mao/selected-works/volume-6/mswv6_11.htm