Squeak, my apologies if my last comment was a bit sharp, it was unintended. I have gone back and forth on the austritt-Zionism question for several years. There appears to be many bases upon which to distinguish a reform communal entity from a Zionist State run by Jews. However, I cant see how you get around the facts that (1) Austritt dictates severing all ties with institutions that are un-Jewish; (2) An institution is un-Jewish if it is subject to Torah law but does not recognize such law as validly binding on it; (3) The State of Israel, as it is run by and established by Jews is subject to Torah law. Based on these premises, the State is un-Jewish,and association with it as an institution is problematic (I say problematic, not prohibited; I am aware of the seriousness of the question and the danger of absolutes).
True, the founders and perpetrators of the institutional State are likely tinokos shnibu, and if there actions are contrary to halacha, will likely not be held responsible for their wrongdoing. That has little to do with the obligations of those of us who do recognize the Torah and its requirements.
For me it boils down to the fact that if I condone the existence of the “Jewish State” I am implicitly declaring to the world that in fact this is a Jewish State. Certainly, however, it is not. It is an un-Jewish State, and as such, it is my duty as a Jew to contend with other Jews that the State does not represent the proper fulfillment of God’s will. And it is my duty as a Jew to represent to the rest of mankind that the way the “Jewish State” conducts its affairs is not the way God wished humanity to run its governmental institutions. And it is my duty, as a member of mankind, to work in my own small way to develop governments and institutions that reflect the Divine, and not perpetuate those that reject God’s will as the guiding principle of human conduct.