Oh, go ahead and hire him. Academia has such a short supply of anti-Israel / anti-American, pro-terrorist knotheads in its faculty lounges.
For every dip stick like this, who doesn't get hired because of his anti Israel stance, there might be 20 who don't get hired because they are pro Israel. That is probably a stretch, because there probably aren't 20 professors in the US that are pro Israel, but if there were, the same thing applies.