There are a number of rules concerning financial transactions in Judaism. The most common are the prohibition on issuing usurious loans to other Jews, but the requirement to charge interest on loans to non-Jews and the inability to make any financial transaction on Shabbat (Friday at sundown to Saturday at sundown).
In the Middle Ages the Church imposed restrictions, and in later centuries it was mainly governments that imposed restrictions.
Thousands of Anti-Semitic Laws have been introduced in hundreds of different countries. They did things as varied as give housing restrictions for Jews alone, to expulsion of Jews, to professional restrictions for Jews alone, to marriage restrictions, to forcible conversions, etc.
Hitler treated the Jews as outcasts. The Jews were persecuted and then subjected to restrictions that anyone else were not given.
After the Passover in "Night," the Jews faced stricter restrictions by the Nazis, including forced labor, increased violence, and eventual deportation to concentration camps. The Jews were subjected to harsh living conditions, limited food rations, and constant fear and persecution. These restrictions culminated in the mass extermination of Jews during the Holocaust.
On the whole wealth did not help people. Most safe countries had strict quotas on the numbers they admitted. Please also note that all Jews were deprived of their money, either before or on entry to camps. There were also severe restrictions on the amount of money that Jews were allowed on entry to ghettos.
Restrictions on Jews were designed to marginalize and isolate them from society, limiting their rights and freedoms. These measures often aimed to control their economic activities, social interactions, and religious practices, fostering discrimination and persecution. Ultimately, such restrictions sought to reinforce societal prejudices and maintain a dominant cultural or political order that viewed Jews as outsiders.
World War 1 ended in 1918. There were no restrictions in Germany on where Jews could live till 1939.
Jews have no dietary restrictions when it comes to plant matter; they eat all of the same vegetables that Non-Jews in the same region eat.
No, however there is a Jewish law that states interest cannot be charged to a fellow Jew. Jews may charge interest to non-Jews, and non-Jews have no restrictions regarding interest (under Jewish law).
They do?
For the reasons why people hate Jews and Israel, please see the Related Question below (so that they need not be repeated here). As specifically concerns the United Nations, people that hate the Jews and Israel hate that the United Nations was responsible for granting Jews permission to declare the State of Israel.
The United States did not get the Jews out of Germany, so they spent no money on that.