Avira:
Why are you unwilling to question of heter of the London Beis Din, but will happily argue against the Brooklyn eruv matirim?
Both cases are similar: respectable rabbis are being matir something that is seemingly totally assur with no obvious heter and not doing a good job of explaining their reasoning. You have three main choices:
1) The left-wing approach: never question a heter. Only haters question heters.
2) The right-wing approach: conclude that the otherwise respectable rabbis have chosen to ignore halacha completely with no basis and are apparently closet Zionists or something.
3) The approach that will still make people accuse you of being a crazy right-winger: have the seemingly reasonable expectation that when rabbis make a massive chiddush publicly with far-reaching consequences, that they explain their reasoning so as to not cause confusion and halachic mishaps ch”v. And, yes, even be willing to criticize them when they don’t do so. Suddenly all these posters who usually accuse us of “gadolatry” passionately believe that all rabbis are above criticism (assuming what they’re saying is b’tzad heter).