Jews Blocking N. Finkelstein's Tenure

There are Jews such as Alan Dershowitz who don't want dissenters of Israel to have a say in American politics. One of those detractors, Norman Finkelstein is in a battle of tenure because Dershowitz is influencing DePaul University into not allowing him tenure at all. Why do Jews hate Jews who disagree with Israel?

http://www.normanfinkelstein.com/

>>1
Simply cos they aren't Jews. They're Zionists.