Yes and No. Jews have origins in the Middle East and, therefore, most Jews do not have ancestors who lived in Germany for many centuries, if at all. Those Jews are certainly not Germans. As for the Jews of Germany, they spent much of the 1700s and 1800s fighting for integration with Christian Germany. By the 1930s, they considered themselves and were considered to be Germans. When the Nazis took control of the German government, the distinction between Germans and Jews became apparent once again.
Many Jews from eastern Europe have German-language names (often via Yiddish) and that can be confusing, since it is not necessarily the case that a Jew with a German or Yiddish surname has German Jewish ancestors.
As with any other country - some are, most aren't.
No. Not all Germans are Jews and not all Jews are German. But there are German Jews, as well as Jews with many other nationalities.
People who were not Jews were treated differently than the Jews in Nazi Germany. Some of the Jews were German citizens but they were treated as Jews.
They had to hate jews even if they liked them (it was their job)
They had to hate jews even if they liked them (it was their job)
They had to hate jews even if they liked them (it was their job)
The National Socialist German Worker's Party, or Nazi Party for short, excluded Jews from German citizenship.
German Committee for Freeing of Russian Jews was created in 1914.
There were many German-Jews who at the time of the WWII, but there wasn't really a "Good" leader who was all that great to the Jews. The Jews were basically cut to nothing by all the Germans.
Wasserburger can be a German Jewish name, but like all German Jewish names, it can be used by both Jews and non-Jews.
The same as American Jews and American Christians. It's about the faith.
They required them to leave. Jews were banned from many places and eventually deported.
Moses Mendellsohn did not have to teach German Jews how to speak German. They were already very capable of doing so themselves. Those German Jews who chose to speak in Yiddish did so by choice (as a symbol of their Jewish identity).