Shooting in Seattle, any idea of Motive?

I usually don't pay too much attention to the comments made by the local "news" announcers since they don't usually write the things that they say on the air anyway, but something caught my ear tonight that really made me wonder what sorts of blather makes it to the teleprompter anyway... Even after the ethnic origens of the shooter were made known the announcer said something about the police still didn't have a motive for the shootings... Let's see here, the Jewish groups were attacked by a "Muslim American" from Pakistan because he was angry at Israel... Nope, not a motive in sight...