Yeah but we can prove that cocaine is harmful to the body. See the difference?
Stupid argument at the same level than the "it's not real communism"
Because it failed before it can't succeed in the future? Guess you never heard of changing the conditions in a scientific study then.
There is also a long historical record of Communism being harmful. I love how you dismiss the "no true Scotsman" logical fallacy of "it's not real Communism", then immediately proceed to rephrase the same argument.