DY, what he said and what he did were two different things. Considering the Nazi leaderships unhappiness with Vom Rath because of his extracurricular activities he might even have been assassinated by a Nazi who would escape and let them blame it on the Jews. This worked with the Reichstag fire. In any case, in real time a person has to make a decision. Inaction also has consequences. This is one of the lessons of the story of Kamtza and Bar Kamtza.
MW, I already answered you. The mitzva to conquer EY is on Am Yisrael not one an individual. Both Rav Shlomo Aviner and Rav Eliezer Melamed have made this clear. In fact, according to Rashi (Gittin 8b d”h kibush yachid) a personal conquest is not even considered a conquest.