The Crisis of American Leftist Jews Like Peter Beinart

The crisis is encapsulated, helpfully enough, in the call out in the newsprint version of the New York Times Book Review review of Beinart's book The Crisis of Zionism:

Beinart has a faith in 'liberal ideals,' which he often makes synonymous with Judaism itself.

Isn't that the precise problem with his analysis of the subject--that he, a right little solipsist, conflates Judaism with his own leftism? He therefore can't help but be dismayed/disappointed/disgusted etc. by a Likud-led Israel, which, to someone with his worldview, is both politically and personally anathema.