Ujm said “We are following in the footsteps of HaGaon HaRav Elazar Menachem Man Shach zt”l, who also spoke theoretically when he paskened that it is absolutely worthwhile and even obligatory for the State of Isrel to surrender land to the Arabs for peace, if in fact surrendering land to the Arabs would result in peace.”
He wasn’t speaking theoretically. He was asked by the Chareidi politicians whether to vote in favor of the “Oslo Agreement”. He never for a second suggested the State of Israel surrender its entire sovereignty to the Arabs or anyone else, which is what you are suggesting. He also qualified his psak, as you said “IF in fact surrendering land to the Arabs would result in peace.” That’s a really big IF, don’t you think so?