IS ANDREW SULLIVAN REALLY A LIBERAL?

In his interesting post, The Death of Conservatism, Sullivan writes:

Conservatism, if it means anything, is a resistance to ideology and the world of ideas ideology represents, whether that ideology is a function of the left or the right.

My conception of liberalism is heavily influenced by the thoughts of Isaiah Berlin and here's one of his statements about the meaning of liberalism:

The notion that there must exist final objective answers to normative questions, truths that can be demonstrated or directly intuited, that it is in principle possible to discover a harmonious pattern in which all values are reconciled, and that it is towards this unique goal that we must make; that we can uncover some single central principle that shapes this vision, a principle which, once found, will govern our lives – this ancient and almost universal belief, on which so much traditional thought and action and philosophical doctrine rests, seems to me invalid, and at times to have led (and still to lead) to absurdities in theory and barbarous consequences in practice.

Introduction to ‘Five Essays on Liberty’ (1969) 47–8 [lv–lvi]