Why did the Nazis hate Jews?

The Protocols of the Elders of Zion is an antisemitic fabricated text purporting to describe a Jewish plan for global domination. The forgery was first published in Russia in 1903, translated into multiple languages, and disseminated internationally in the early part of the 20th century. According to the claims made by some of its publishers, the Protocols are the minutes of a late 19th-century meeting where Jewish leaders discussed their goal of global Jewish hegemony by subverting the morals of Gentiles, and by controlling the press and the world's economies. Charges of a Jewish conspiratorial element in Germany's defeat in World War I drew heavily upon figures like Kurt Eisner, a Berlin-born German Jew who lived in Munich. He had written about the illegal nature of the war from 1916 onward, and he also had a large hand in the Munich revolution until he was assassinated in February 1919.

The Jews controlled the banking industry and held the notes for a lot of private enterprises. This was not just a German thing. Mark Twain for example wrote a piece on why the Jews were disliked decades earlier and it was the work of a US citizen (if you didn't know). Consider the story of "Merchant of Venice" (Shakespeare from a much earlier time)
Let me set a little historic bit of information here"
Ghetto when used to refer to Jewish parts of a town is not income related. Jews tend to set up Jewish communities inside of a town so that it can be kept ritually clean and to allow the posting of markers that define where a "Sabbath days journey" would begin or if you prefer just how big the house is (it was considered to be alright to carry a burden inside ones house on the Sabbath, but not outside the house. So the Jews for Sabbath Day set boundaries up to define when it crossed the line between carrying inside ones own property to work.
So yes, the Jews lived in Ghettos in the purest form (an area where those of a specific nationality/religion or ethnic origin form a sub community to the larger community.
The Nazis just capitalized on existing hatred, one shared by Henry Ford and many others who were not Nazi.

They didn't.
Not any more than the rest of Europe.
They just used a common foe to advance their agenda.
If Germany had not done it, France would have.

It was an extension of the antisemitism that existed in Europe (and elsewhere, including the US) at that time and before. It was even more pronounced in Germany. There, Jews had long struggled to be something more than 2nd class citizens. To combat this, Jews learned to use academics to raise themselves out of the ghettos and earn respectability. This backfired in Germany. Some seeing so many Jews in ranking positions in the community or owning successful businesses, were jealous, suspicious or contemptuous of their success.

The loss of Germany to the Allies in WWI led to a delusionally false, idea of the "stab-in-the-back" by elements of the German government, power elites....and Jews. This heightened antisemitism in some Germans, especially in a young Adolf Hitler whose vision of the superiority of the German people needed a scapegoat for why they lost.

Hitler's joining of the precursor to the Nazi Party infused it with his radical, extreme hatred for the Jews, which just kept growing for him. The rest is infamous history.

How 'Fool on the Hill' manages to reverse every fact of history never ceases to amaze me !

They thought Jews were traitors.

Jews were heavily influenced by Karl Marx. The Nazis wanted to implement a socialist agenda and although Marxism is related to socialism, it has more in common with communism. So basically blame the influence of the left

They blamed them for many of the social and economic problems facing Germany (and Europe in general).

Because there Ugliness