Is David a wimp? Clues should be sought in the game to confirm or deny this. Being too nice, with too much trust in people, would not be evidence. Some good guys, once "stepped on the toe," become very mean and vindictive.
Newton's third law of motion states that for every action, there is an equal and opposite reaction. Chris is moving in a certain direction, it is to be expected that someone will oppose him
David should expand his circle of friends; he needs some who can put a person in a wheelchair for the rest of their sorry life