Honestly, this is a silly topic. Who cares what Americans are part Arab. It doesn't make them any less loyal to this country or any less of a good citizen. Hell, Danny Thomas is on this list. Making a big deal of who's on this list could be construed as racist by some.
As far as George Noory and Art bell before him - On nights when its hard to fall asleep, their shows are always good entertainment, regardless of how off the wall the topic was. In fact the more crazy the topic, the better the callers to the show.