As madison10 pointed out, their form of koran tells them to attack Jews, too.
"KING 5 reports the suspect is Naveed Haq, a 30-year-old Pakistani man with a criminal background. He is from the Pasco and it a U.S. citizen, but it was not immediately known how long he has lived in the United States. Also unknown is what sort of criminal record he has. Officials are on the way to the Pasco to interview his family."