Pointing out the devastating results of communism attempts in the past is usually met with outright denial or disclaimers about those not being true attempts at communism, which probably has some validity. However the unfortunate part is that real, true communism simply can't work because of how selfish and tribal humans are, how easily they create enemies of others, in groups and out groups. Communism inevitably devolves into an authoritarian regime, which is an utter failure of the principle of Communism. People in this thread want to bash conservatives for being stupid and not understanding communism, but the reality is that most conservatives simply don't believe that it works. These irreconcilable views are all the evidence you need that communism simply isn't viable unless there is a fundamental change in how humans work.