Tbf most ppl supporting communism actually think that a ideal communist state can't get corruptet (/would defeat it) and there for those history exampels didn't achive 100% comminsim.
Its like christians murdering millions in the past in the name of God, but modern christans would never call that to be apart of their believes.
Ppl abuse ideologies all the time for their own benefits.
Wait until the first person commits murder in the name of Bitcoin...