laager mentality
The dumb idea that the group is so messed up, anyone can do whatever they want as long as they don't kill someone, like having a drunk guy scream insults at a cop while the rest just nod.
The guy tried to start a fight with a cop, but no one stopped him. 'He's one of us,' they said.
The girl got beaten up, and the others just said, 'She asked for it.'
He tried to steal the group's lunch money, and no one said a word.