People become refugees in Afghanistan because of instability in their home areas. The instability is usually due to political upheavals.
Nazis tried to speed up Jewish emigration, but other nations were hesitant to accept these people
About six million Jewish people died in Germany WWII.
The Jewish people in Germany still mourn the loss of their friends and family, even now. World War II was devastating for the Jewish people in Germany.
Many tried to leave, but immigration was very strictly controlled by other countries. The U.S. was very reluctant to admit many refugees. Moreover, Germany did not allow refugees to take money out of the country, and other countries were not at all keen to admit people who were likely to become a public burden. In general, it was much easier for young, single people with good qualifications to leave than for people with family responsibilities.
Read Genesis. You'll answer your own question that way.
Leaving their country to go to another
There are about 250,000 Jews in Germany many in the Berlin area. There are another 90,000 people of Jewish ancestry from Russia. Some of this group is secular, and actively trying to become assimilated Germans, but most still consider themselves as Jews. The number of Jewish refugees from the former USSR is now diminishing, but it still adds thousands of new Jews to Germany every year.
Yes. From 1933 onwards (when the Nazis came to power) many Jews tried to leave Germany, but they needed somewhere (and if possible, also a job) to go to. Immigration to the U.S., Britain and most other countries was very strictly controlled, and usually refugees had to have financial guarantees (from relatives or charities) within these countries, so that they 'would not become a burden'. Different countries had, of course, different rules. Between 1933 and 1941 the U.S. admitted about 250,000 refugees from Germany and Austria; between 1933 and 1939 Britain admitted 71,000, Australia about 50,000, Canada only 5,000 (!!), New Zeland fewer than 1,000 ... (These figures are for all refugees from Germany and Austria, and therefore include political refugees, many of whom were not Jewish). The situation was desperate. Please also see the related question below.
They remain where they are
Israel was created to provide a homeland for Jewish people.
Allied civilians and possibly European Jewish refugees