I have heard Norman Finkelstein. His hatred for Zionism is equal to or exceeds yours Albert except that he publicly states his wishes that the Israeli state lose a future military conflict in a big way and be overthrown and eliminated. He went there to espouse hate speeches, not to live, and as a visiting guest to any country this is not necessarily a right to enter. It was most likely a publicity stunt because he knew he'd be turned away, and now Albert and company can make propaganda of it all, especially because he is Jewish.