Where's that dear? Remember, you're talking to a grandma....
http://www.adl.org/hate_symbols/numbers_88.asp
Funny that this is also the abbreviation of the hall where he resided (Harper Hall). Didn't catch that until Moose mentioned the name. Sure like to be able to read that street name.
This loser was apparently on his own personal jihad whether or not he was a jihadist. He may have simply identified with any/all destructive philosophies/isms that have oozed out of the bowels of hell (communism, nazism, Islamic jihad, whatever).