Of course they should get upset. The west bank is not part of Israel and gaza too so israel shouldn’t have the right to control gaza water and electricity and we should upset that ten thousands of innocent people was killed. Back to germany example the land they gave up was land that was stolen by them before the world wars. By your logic, if the axis was the winners of the war, would that mean that germany would have the right to own france and build settlments on it and whwn french people would have fight they wouldn’t have the right to complains and be upset by germany response?