There's little evidence that is less reliable than that of a person jumping into panic mode during a sudden dangerous event. That "Arabic-looking guy" could have been Mexican for all we know.
I'll wait for the autopsy photos.
In any case, if this IS terrorism, it's just more terrorism against Israel IMHO rather than against America; the shooter just happened to live in the US and was too broke or lazy to go to Israel himself, so he just went for the most convenient target.
IF this is terrorism....it is a truly pathetic attempt by comparison.
And if it was terroism against Israel, the fact that it happened on American soil is of no significance to you?