Kahane was an outcast but that was a long time ago now. Maybe Jewish society itself has become much more right wing and religious. Look at the Safed Rabbis demanding Jews don't rent to Arabs. Look at the Haaretz article a few months ago that reported half of Israeli school kids didn't think Israeli Arabs should have the same rights as Jews.
U.S. defense chief tells Congress: Military options remain against Iran (DPA)
from the article: Lieberman is Kahane. And even the right senses it