Possibly but that's not the issue, the victim was attempting to stand in a space on a train. Anyone suggesting the victim should have done something different is either not understanding the crime, or supporting it. Repeadedly standing up to the racists has made it go global, if he hadn't done...
Unless he was caught singing you can't pin it on him. If they're his friends though it's probably time to find less moronic imbecilesto hang around with before he is caught. Then again it looks like he votes UKIP so he's probably a wrongun.