Or the invasion of Vietnam... Or the annexation of Tibet... Or the bullying of Southeast Asian countries... Or the great leap forward... Or the communist land reforms... Or the anti counterrevolutionary campaigns
The CCP leaves you no end of really good options to pick here.
No, you're just an idiot. Whataboutism is simply a fallacy. It doesn't infer anything outside of inconsistent logic. If you feel threatened by it then it just shows that you're disingenuous.
No, his response is calling out the whataboutism fallacy. The US doing something bad does not in any way, shape, or form make socialism any less shitty. It's poking fun at the delusional people who still think it's a good ideology despite the overwhelming evidence.
This is such a stupid perspective because it's literally just guilt by association. No, sitting down with someone with vile views does not make you endorse, condone, or otherwise suppoer those vile views.