Since communism as an economic model is unachievable and socialism taken to the extreme cripples economic growth regimes labeling themselves as communist have had to incorporate capitalist elements to evade collapse. For example Dengs market reforms and the eventual introduction of hayekian advisors in the economic zone of hong kong.

That and Marxist leninist revolts led to mass loss of life both in direct murders and famines due to administrative incompetence. In short they are murderous hypocrites.