The Huffington Post editors love stories like these because they know that it leads to hate against Israel. That's always how it happens. My theory is that it relates to the European Holocaust guilt problem: The Huffington Post readership doesn't like Jews, but that leads to cognitive dissonance because they know that they aren't supposed to be racist. But if they can prove that Jews are the racist ones, not them, then they can spew their hatred of Jewish people without feeling at all guilty for selling out one of the Left's key values (i.e. don't be racist).
My theory was backed up by the comments thread, as the collective "mere anti-Zionist" mass forgot to pretend that they merely didn't like Israel and immediately engaged in Jew baiting. Although the top favorited comments were dominated by reasonable people, those haters who showed up showed their true colors. Check out some examples: