Fox News reports:

PHILADELPHIA (AP) -- Five University of Pennsylvania students were charged with beating, kicking and pouring motor oil on a Princeton student visiting for a debate tournament. The five surrendered Monday and were charged with aggravated assault, reckless endangerment and making terroristic threats, police said. They were released pending a hearing Wednesday.

While this is clearly a 'hate-crime' against 'People of Princeton Descent', the local police are blaming beer.

Detective Supervisor Frank DeMeo said he wasn't surprised by the attack.
"I've seen kids do things and they get out of hand," he said. "They all have beer."

Alcohol in never an excuse for gratuitous violence. Moreso, since drinking impairs your reflexes and reaction time, it is best to get all your violent outbursts, wife beating, and cap busting out of the way first.