What connections were there between Timothy McVeigh and terrorist groups? Any? Even if the shooter happens to be white, it doesn't rule out known terrorist groups, does it?
Even if the shooter happens to be white, it doesn't rule out known terrorist groups, does it? No, of course not, nor was I implying it did.
OTOH, we know that not all Muslims are terrorists, but all terrorists are Muslims. Also, not all Arabs are terorrists, but a disproportionately high number of terrorists seem to be, in fact, Arab.