There is no doubt that Chomsky using his "credibility" as a Jew has damaged Israel over the decades. And for Israel to tell symbolically tell old professor that he is not welcome in the Jewish safe haven lets him know how the Jewish government and a majority of the Jewish street feels about him. I personally feel threatened every time I hear Chomsky speak about Israel. He has not been a "critic" of Israel. He has spend his life as a soldier of the enemy.
Abbas: West Bank arson is a 'crime against humanity', vows to petition ICC (Haaretz)