Because they hate the Jews. Just like the neo-Nazis do. Just like the average "progressive" and average Big Media outlet does. The whole bash-Israel thing is just a cover for their Judeophobic hatred.
More at Small Dead Animals, where there's links to more.
Uh-oh... the video above was removed "due to terms of use violation". Yeah, sure, right. What's one of the terms, "Thou shalt not depict any Muslims or Islam in an inconveniently-truthful, light"???
But no sweat...
An even better video here. The other one is like a sanitization/whitewash compared to this one.
So where's the anti-racism "progressive" crowd now? Oh, wait... they hate the Jews, too...
You know, whatever Israel wants to do to stop those who want to destroy her and her citizenry, go right ahead; you've got my blessing, Israel. Whatever you decide. Take your rightfully-won and legally-held land as your own and give an ultimatum to the anti-Semitic Muslims/Arabs thereupon to swear allegiance to Israel and to pledge total acceptance of all Jews... or leave the areas, going to where they'll find pretty much only other Muslims. It's not Israel's fault that those Islamic nations won't let them immigrate to be with their Islamic brothers and sisters. It's not Israel's problem. Whatever the Islamic World does to the so-called "Palestinian" Muslims, it's not Israel's problem. If the Islamic World harms these Muslims, then the International Community must turn on the Islamic World, condemning them for the intolerant, brutal, genocidal Islamo-imperialists they are.
And take out Iran's military infrastructure and nuclear complexes. Get 'er done and show the world you won't submit to their hatred, won't submit to these neo-Nazi bastards in kaffiyehs.
In the spirit of "Never Again", I grant Israel my unrestricted blessing to neutralize the horrifically hateful neo-Nazi threat to her safety, security, well-being and absolute, 100%, inalienable right to exist. Israel, it's time to exercise your rights.