One night I was watching a documentary about safety on aeroports and commercial airplanes. It was produced after 9-11 and focused on terrorism.
Many El-Al personel was interviewed and one mentioned a martial art teached to many security agents: Krav Maga. He defined it as a self defense technic to win a fight without using arms (guns, knifes, whatever).
I searched for it on google and found this site: International Krav Maga Federation (Imi system). It has branches in many countries including USA, some European countries and, of course, Israel. I think it is part of the IDF's curriculum, but it's also a technic for civilians.
If you can't avoid a physical confrontation, which is the best solution, I say break some anti-semitic legs!