Not all the Jews are laying down letting the Nazis just kill them or humiliate them. There were attempts to stop the Nazis or just to plain escape from their cruelty. It was very hard to fight the Nazis and their followers but there are a few who had resistance groups.
One of the biggest is the Bielski brothers and their partisans and the many other ones that worked with them during the war. The three brothers lived in the forest and saved as many Jews as they could. Their goal was Jewish preservation over killing the Nazis. They had one of the most organized groups of partisans ever. They had kids, old people and women besides men who were able to fight. They also organized saving Jews from the ghettos as they moved throughout the forest. This is one of the most inspirational things to have happened in such a horrible time as the Holocaust was. The brothers could have only worried about themselves and their family and no one else but they kept taking in more and more people no matter what. In desperate times like those it was usually every man for themselves so it took special people to do what they did for all those Jews.
The other biggest resistance was the Warsaw Ghetto uprising. They didn’t want to be all killed by being sent to an extermination camp, they wanted a chance to survive on their own or at least fight to stay alive than let them force them to their deaths. The biggest attempt at the rebellion took place from 19 April, and ended when the poorly armed and supplied resistance was crushed by the Germans, who officially finished their operation to liquidate the Ghetto on 16 May. It was the largest single revolt by Jews during World War II. It wasn’t successful as you think as thousands of people died during the revolt and over 7000 were still sent to the extermination camps.
One of the many reasons there weren’t many resistance groups was because the Jews weren’t trained to fight in combat or to survive away from normal living. The Jews are a peaceful group of people not into fighting others. They were enslaved in the past and kicked out of many places and taken over so many times none of them had the ability to really fight back. Also there were more Nazis or other soldiers than there were able Jews to fight, and when they were taken from their homes they didn’t have the supplies or arms to fight back. They thought if you let this go on it might end at some point, if you fought back you would be killed right on the spot no ifs ands or buts.
Denmark wouldn’t let the Nazis come in and take over or let them take their Jews. They stood with the Jews even wearing the Yellow stars with the Jews when all Jews were asked to wear it. Miep Gies was the office secretary who defied the Nazi occupiers to hide Anne Frank and her family for two years. There were so many people who tried to save Jewish kids by hiding them or nuns hiding Jewish kids in their church.
The same reason why many Gentiles didn’t resists the Nazis was the fear of being killed or sent to work camps or even concentration camps like the Jews. The other thing was many of the Gentiles actually believed in Nazism and were Anti-Semitic so they didn’t care about the Jews at all. Many also were following orders and didn’t want to be demoted or just the fear of upsetting their leader was too much. It is similar to Korea or Cuba people don’t want to tick off the lead guy. I think Denmark deciding to stick with the Jews and not let them be killed and shipped away to die later was inspiring and you wish that more countries would have taken that stance to Nazi oppression but so many were not ready to fight the Nazis or the Russians.