The best way to attack and disprove the assertion that “communism’s not so bad” is to lay out the pedigree of the ideas behind it and then point out that Communism and its variants have been responsible for more mass murder, atrocity and human misery than any other ideology outside of Islam.
None of that nonsense survives an honest first principles-based debate. That’s why leftists have to shout you down, resort to name calling and other ways to shut you up. They know their ideas are indefensible.
I used the numbers game, the dictators game, the economic failure game...they kept coming back to the line “But it did not pose a threat to the U.S. and was trumped up by the U.S.”
It’s their need to stifle and shut up their opponents that LEADS to the beatings, killings, mass murder, and in the end genocide.