Forget it, you said you are a democratic socialist right? Don’t fight loosing arguments about history with people. Shut them up with this one argument.
“I will defend every seemingly communist country and their actions, only after you defend every capitalist nation and all of their actions. Simple enough right?”
If they say some shit like “Well I’m not arguing for another trail of tears, I just think the economic system of capitalism is better”
Just respond with “Good, so your alignment with a type of economic system or model still leaves plenty of room for variations on policy🤔”