[Fipherion]

most of this was tl:dr but I thought that a phrase that my economics professor used to say a lot fits pretty well in this discussion.

"any idea that is fine in theory but not in practice was clearly not a good idea in the first place."

Here's why communism is "evil" it places too much power in the hands of the few. another often-used phrase is "absolute power corrupts absolutely." No man or group of men is capable of running a communist state cleanly. History has shown this. The logical way to deal with this is to spread the power to more people. The economic and political struggles of the ages have been over this balancing act between how much power is allocated to how many people.