myfriend: You quote often from R. Schwalb’s Selected Essays. You would do well to read R. Hirsch’s works yourself (The Nineteen Letters, Horeb, Commentary on Chumash, Collected Writings Vols. 1-8, Judaism Eternal, Commentary on the Psalms, Commentary on the Siddur, Commentary on Mishlei, Commentary on Pirkei Avos), then you can discuss R. Hirsch’s ideas with firsthand knowledge.
I actually agree with you about R. Hirsch and Zionism. I too, consistent with my adherence to R. Hirsch’s approach, and strongly anti-zionist (perhaps more than most, actually). But use have misused the principle of austritt (as many are wont to do). Austritt applies to Jewish distortions of Torah eternalized through systemic and institutional norms. It would not apply to non-Jewish ideas and institutions. Indeed, it cannot apply to ideas at all. Austritt is an associational principle; it governs interpersonal associations, not subjective mental thought-processes.