With communism, I believe that *no* government, even a democratically-elected one, has the right to exert that much control over peoples' lives, especially for the objective of evenly distributing the nations' resources for the benefit of few and at the expense of many. An objective, I may add, whose success is completely dependent on a society completely free of corruption. The practical application of communism almost always Draconian in nature and involves the forfeiture of individual rights that should never be forfeited under any circumstances, such as the freedom of speech, religion, and the right to bear arms.
These factors lead me to conclude communism = evil.
My argument against socialism reaches a similar conclusion but is more heavily based on American law, history, and culture. I will omit such an argument from this discussion because this is not an America-specific thread.