Don't assume and don't accuse unless you know it to be fact! You hurt people when you make accusations that are not true! Just because someone else said something or you heard something about another person, doesn't make it true!!!!!
Listen, ask, seek clarification, explore, hear each other instead of putting up walls while thinking it's only the other person who "is" the problem. Communication is a two way street in which group think and consensus can throw roadblocks.