"What puzzles me is how each supporter cannot see the issue with their own side." well I'm communist and see the potential issue. Also communism has many forms, collective property can be managed in many ways, not only by government. cybercommunism can help a lot here, computers aren't prone to many problems of human nature. However at the moment socialism is adequate solution, we are not ready for nationwide communism yet and forcing it is bad idea. So, stick with socialism at the moment and communism only in communes.