I agree with Freud's point that aggressiveness came before private property - and so to say that with communism, everyone will be able to get along and share the wealth and work when work needs to be done -- doesn't make sense. People will still want to fight, and climb over one another, and love each other, and break up, and do all of the basic human emotions -- because those have existed since the beginning. Man in the state of nature still had aggression before he realized he could take something as his own.
However, I don't agree that all of us immediately want to fight with our neighbors and that we have an urge to kill them (Page 95). Perhaps we feel competitive with them, especially if they don't seem friendly. But I don't think we all automatically feel hostile towards others. It depends on the environment (work, home, school, etc.)