If your brother sins, rebuke him, and if he repents, forgive him. It churns up images of hurt, anger, bitterness. People don't like to confront others because it's just too painful. But avoiding confrontation doesn't take care of the problem at hand.
Avoidance allows it to fester and grow and get out of control.
I have a suggestion for the touchy area of confrontation. There's a way to put a positive spin on it. Whenever you confront, make sure you do it because you care. Carefrontation involves following certain biblical guidelines. Here's a scenario that might be familiar.