I don't recall any Jews passing out sweets and dancing in the streets on 9/11. I don't recall any Jews among the 19 9/11 hijackers.
In case you haven't heard, we are fighting a global war against Islamofascism. Like the fascism of the 1930s and 1940s, Islamofascism comes in 2 major flavors, Sunni and Shia (analagous to Nazi German and Imperial Japanese), with Arabs making up the Sunni component and Persians making up Shia component.
So I have no problem with Americans being anti-Arab or anti-Persian after 9/11. IIRC, there was plenty of anti-Japanese and anti-German sentiment in America after 12/7. Japanese and (some)Germans were rounded up and placed in interment camps. Anti-Japanese and anti-German propaganda abounded, complete with cartoonish ethnic stereotypes that would never pass muster in today's politically correct, post-'long-march-through-the-institutions' world.
Sure, there are some loyal Arab-Americans who love this country more than their heritage, just like there were loyal Japanese during WW2. There was an all-Japanese-American Army unit that was one of the most decorated units of the war that fought in the Italian campaign. I would love to see an analogy of that today - a vocal and loyal group of Arab-Americans that stands up for their country against the Islamofascists. AFAIK, such a group doesn't exist, or if it does, it's not getting the media coverage it deserves.
Let's face it: after the murder of 3000+ Americans and others at the hands of Arab savages, being anti-Arab in America should not be unexpected. IMO, the ball is in the Arab-Americans' court to prove that they're NOT terrorists, and are worthy of being American citizens. It worked once before, and it can work again.
Even if he had heard, it probably wouldn't do any good.
Hmm, I would not even go into imagining such a "puzzling behavior".