Reply To: How do we know that anti-Zionist posters are Jewish?

Always, the point is that RS did not pasken. He simply relayed the opinion of those whom he held to be experts. BTW, Rav Moshe did not take a position on “land for peace”. Rather, he told Begin to follow the advice of security experts. On the other hand, those rabbis who opposed it ruled that it is halachically prohibited based on Ramban in his Sefer haMitzvot (mitzvot that Rambam “forgot”) and the obvious principle that pikuach nefesh does not override a milchemet mitzva.

BTW, the Mir yeshiva went from Vilna to shanghai against Rav Chaim Ozer’s pesak. When asked about it years later, one of the rabbanim said that that was before daat Torah was invented.