Although in this fine book Norman Podhoretz comes close, I would have to say that the core of fundamental differences lies one layer deeper.
- Leftists are zealous adherents to a secular religion. While conservatives believe that only God is perfect (the Judeo-Christian ethos) and that each man can strive to be better in His image, instead the left believes that humanity can be perfected. - Perfection starts with the purity of leftist intentions, most importantly that of equality in all results (the "unfairly" successful must be brought down, and the "oppressed" must be raised up). - Leftist intentions are made manifest by the cognoscenti via a top-down system, because each individual person cannot be trusted to better themselves. - A top-down approach can best be implemented by an all-encompassing government that is the keeper and sustainer of perfection.
All other things flow from the above dichotomy, including charity versus welfare, moral relativism, belief in self-correcting versus zero-sum systems, etc., etc. The essence of all this is a clash of religions. Those Jews who are liberal have therefore abandoned Judaism and made God subservient to the leftist religion.
BTW, don't believe the nonsense here from other reviewers about the "Christian Right" holding Jewish conspiracy theories. That is a deceitful liberal trope that is more correctly the obsession of foaming-at-the-mouth leftists whenever they talk about Israel and Zionism.