Subsidiarity & the UN

From NCR's John Allen's column:

Conservatives devoted to the principle of subsidiarity increasingly wonder why the Vatican is gung-ho about handing over chunks of national sovereignty to an international authority they see as unaccountable and occasionally hostile to religious values.

Why do conservative Catholics seem to think that subsidiarity = American federalism? Just as subsidiarity upholds the good of an international theocratic bureacracy headquartered in the Vatican that we call the Catholic Church, so does it uphold the good of an international council of nations that seeks to maintain the good of a globalized humanity. Excessive contempt for the UN held by conservative Catholics only adds to my suspicion that they're just closeted "cafeteria Catholics" of the red, white, and blue stripe. And if being "unaccountable" and "occasionally hostile to religious values" were reason enough for wholesale condemnation then conservatives should be the first to renounce their US citizenship.