Hate to tell you this but not everyone is on the level that we have to deal with.
Communists have this crazy habit of turning on the very people that help put them in power.
They use people and then take them out once they don't need them anymore. Remember Khmer Rouge, the forced starvation that took place in Russia after the communist revolution.
The point is, we always have to fight evil as long as we're on this Earth. We aren't perfect but at least the options you'll find elsewhere are a heck of a lot worse.
What I remember about the Khmer Rogue is that the US bombed the shit out of Eastern Cambodia, displacing millions of people and killing hundreds of thousands, and driving them into the hands of the Khmer Rogue. And when the Cambodian government of Norodom Sihanouk complained, we staged a coup and toppled him and replaced him with a puppet named Lon Nol who just went along with us bombing and killing his people. After all, he was a western Cambodian, and those were just Eastern Peasents.
And when we finally pulled out, those angry folks in eastern Cambodia decided they were going to do something about old Lon Nol and his supporters in Western Cambodia.
But you'll leave those parts out. You'll say, "Gosh, I guess old Red was a bad dog" and leave out the part about how you locked him in a cage and beat him every day.
Same thing with the USSR. you talk about how those mean old Communists killed all those people and leave out the oppression of the Tsar, the brutality of WWI, and the long Russian Civil War that was exasperated by the attempt of the West to prop up various "White" factions. Ah, Old Red must have been a bad dog. forget about the brutality he faced for years before went on a rampage against the neighborhood children.
and this is a key point. Any political or economic system usually sounds wonderful on paper. Communism? Sounds wonderful on paper. Everyone is taken care of, everyone gets a fair share. Capitalism. Sounds wonderful on paper. If you work hard, you get rewarded.
Where they get messed up is when flawed human beings get plugged into the system,and just find ways of mucking it up.