If you're going to think about something, then please make the attempt to do so clearly.

The standards you are applying to 'communism' here are ones that would damn 'capitalism' as well -- there have been plenty of atrocities committed in the name of both, and neither philosophy has abstained from advocating violence. Not to mention that you'd make most major religions illegal as well!

Step one in thinking clearly is to define and use terms precisely. What seems to be your working definition of "communism" is more or less "all the bad things done by people that the US disagrees with" -- if you're trying to make value judgements, a near tautology.