A number of sociologist, psychologists, and historians have attempted to explain why the German people didn't stop the atrocities of the Holocaust. Some possible reasons include the devastation German society felt after World War I as well as the effectiveness of Nazi Propaganda.
Answer 1
The population of Germany had suffered major losses from WWI and the country was in a depression. Hitler was a speaker who blamed the lack of jobs on the Jews,saying that the were taking jobs from the German people. He used all of the people's worry and turned it against the Jews. The Germans wanted a strong leader and that was what Hitler was to them. Soon he became leader and started to expand Germany's borders. Also, most German citizens didn't know that Jews were being murdered in concentration camps. Anyone who resisted had to keep quiet or be punished. Some were sent to prison, killed, or relocated for speaking against Hitler.
Answer 2
The question assumes that the Holocaust was widely known in Germany. The reality was more complicated. According to the German historian, Helga Grebing, writing much closer to the time, a lot of Germans had some idea what was happening and made a point of not finding out more. The question also assumes that Nazi Germany was the sort of country where one could protest about government policy. This is not the case; it was a ruthless Dictatorship and a police state that crushed any dissent.
Some individuals did protest, but organized protests and resistance were almost impossible because of the secret police and the terror apparatus. Public protests, for example, in the media or by demonstrations were banned. The last anti-government demonstration in Nazi Germany took place on 8 February 1933 and the police opened fire on the crowd almost at once.
Answer 3
Some did, but they were going against popular opinion.
A lot of the 'normal Germans' in Nazi Germany didn't know of the holocaust, as it was done mainly in a secretive way. Antisemitism was, of course, very common in Nazi Germany, so most of them wanted the Holocaust. People also had such nationalistic pride that they believed in the Führerprinzip, or the "the Führer's word is above all written law".
If they wanted to stop it anyway, they most likely couldn't, as Heinrich Himmler's Schutzstaffel (SS) controlled the operation of the Holocaust. The Gestapo was given "unlimited police authority", meaning, that the Gestapo could simply arrest anyone they want, interrogate anyone they want, or even greater, kill anyone deemed a "threat to the State".
1918
Yes, though rather late. Poland resisted Hitler's demands and was invaded in September 1939. Britain and France declared war on Germany on 3 September 1939 in response to the invasion of Poland.
They did nothing until their advancing forces actually over-ran the camps.
Germany and Russia. The Germans wanted to stop Russia from advancing into Germany.
The problem is whether the perpetrators are willing to recognize another holocaust as it is forming and occurring. For example, many people point out that the 50 million abortions (just in the U.S.) qualifies as another holocaust. But the perceived benefit (casual sex without responsibility) is so seductive and addictive that the perpetrators would not seriously consider its status as a holocaust.
Tried to persuade the germans to free some jews in exchange of weaponary
The killings stopped when the camps were liberated by the Allies. In many cases the SS fled as the Allies approached and left the camps.
You can't.
Many of the groups the Nazis victimized - Jews, Communists, homosexuals - were held in contempt by many German people. Also, many Germans benefitted financially from the Holocaust.
Because, if ANYONE tried, the Nazis would treat them like they were treating the Jews. And, when they did, death for them would be Instantaneous. Any protests=Yay! new pile of dead "Jews"
They could be argued that they were an ally because they did nothing to stop it and they refused emmigration to the Jews in the late 1930's and the early 1940's. But it would be going too far to call the USA an ally to the Holocaust.
Other countries, especially America, did absolutely nothing!
No one knew that the Holocaust would happen, not even those in charge of it.
Nothing. It's normal. It means you have to use the restroom or your food is digesting
Anne Frank didn't stop the Holocaust. She just made a diary on the thing. The Allies stopped the Holocaust. Anne Frank was just a teenager during the Holocaust. She could not have stopped it. The above answer is correct. See link below for more information.
The Holocaust was not the fault of the US! It is sometimes said that the US and their Allies did not do much (or anything) to stop the Holocaust. See the related question.
1945