We still have yet to see a heter cited in the poskim to allow being jn a church during a ceremony that involves prayers etc…for the sake of sholom malchus. That rule isn’t a heter to do absolutely anything you want.
Funny how the same people who don’t like it when Torah jews blindly follow gedolei yisroel, who do noy engage in highly questionable behavior and who only teach daas torah, suddenly have emunas chachamim to the Nth degree for political rabbis doing things which are questionable.