People get into this habit of doing as they are told. And despite what Hitler and his minions like to spew about Jewish Criminals, most Jews were law abiding sorts who sorta thought things would work out. The Nazis were also careful to insist that the Camps were RELOCATION Camps and many people, victims of wistful thinking, wanted desperately to believe that rumors about death camps were simply exaggerations and lies. As another answerer noted the Nazis had guns the Jews (mostly) did not. On those occasions when Jews resisted they were shot in sight of others and that sent a strong message to the rest that they best not resist.
The Nazis (should I anger people by saying Germans) went to elaborate ploys to assure people that the Camps were simple 'concentration' camps planting newsppaer stories and even showing a film showing 'happy Jews' in their model camp. Even after being packed in cattle cars for several days without food and water and they poked and prodded along to the gas chambers the Nazis continued their ruse, with signs on the death chambers suggesting they were bathing houses and disguising the death chambers as shower rooms.
Peace//////////\\\\\\\
