In order to have unity with other people you must have unity with the Father. None of us are perfect. We all have a LONG list of faults. Therefore if we are not careful we can easily upset someone else OR let them make us angry. People trying to get along through their own strength are wasting their time. The only way to have unity or togetherness in relationships is through the power of the Holy Spirit.
Our flesh is drawn to being angry, going off, and putting people in their place. We know, however, that we were made to have productive and good relationships with others. There is only one way to make this so. And that is to seek Jesus. Learn to love like Jesus loves. Peace, Joy, and forgiveness will be inevitable.