Jews did not prevent Germans from working at any time in German history.
The Jews were considered different from the rest of Germans because they were Jews. They were stereotyped as being greedy and worth less than other Germans. Simply put, all the usual racist stereotypes and general discrimination. The other way to answer this is that they were one of the minorities discriminated against, while the Germans were one of the parties doing the discrimination. Also, for obvious reasons, the Jews sided with the Allies, while the Germans were the main Axis powers. Lastly, the Jews had no major combat involvement in the war. They were often the prisoners in Nazi concentration camps, but they were rarely, if ever, combatants.
many denied it ever happend especially the slaughtering of the Jews
Whipping was one of many punishments. As the Germans had total power over the Jews, they could do what ever they wanted.
The Germans at the time called it "the Final solution". The Jews to whom it was done call it the "holocaust". What ever it was called it was a genocide of massive proportions.
We protest against the ever-mounting cost to the world of asylums, prisons, homes for the feeble-minded, and such institutions for the unfit.
I am not sure I understand your question, but if you are asking about Nazi Germany, the Jews made up only about 3-4% of the population. Undoubtedly before Hitler came to power, they owned businesses and hired and fired people, but it is doubtful they "denied" Germans work. For one thing, the Jews in Germany were Germans (Judaism is a religion, not a race). For another, German-Jewish business owners wanted the best people to work for them, the same as their Christian counterparts; it is unlikely a qualified candidate for a job would have been excluded because the person was in the wrong nationality. Once the Nazis came to power, Hitler made many false and totally inaccurate accusations about the Jews, including claiming they controlled the economy and were biased against Aryans. But there is no historical evidence to support either accusation.
The ones who had a conscience. If the question is specifically referring to the Nazi War Criminals who masterminded (and maintained) the systematic execution of the Jewish people, none of them expressed any remorse for their actions against the Jewish people. The closest any Nazi leader ever got to such remorse was Höss, who apologized to the Polish People for the atrocities he committed against Poles (while running Auschwitz) before he was hung. He never mentioned Jews in his apology. As concerns Germans in the Post-World War II Era, Germany has developed a national sense of guilt and shame in the wake of the Holocaust and most Germans regret very strongly that they or their ancestors were part of that atrocity. To this day, Germans argue as to whether they are allowed to have patriotic spirit in the same way that many other countries, like the United States, do because nationalistic fervor brought on such a saddening and scary event.
Israel is the ancestral home of the Jews.
he could ever be a part
He did abandon non-violent protest as it was not working out
Jews have been discriminated against in virtually every country they have ever lived in. Sometimes it was blatant (as in permission to kill Jews) other times it was more subtle. Recently - in the PC (politically correct) era - it has become impolite to openly discriminate against the Jews. However, open any newspaper and see how Israel is discriminated against when it tries to defend itself against its sworn enemies.