All countries
Israel
About 78% of the Jews in the occupied or war impacted parts of Europe were killed in the Holocaust (also called The Shoa). In some countries, such as Poland and Lithuania, 90% of the Jews died or were killed.
Jews practice Judaism wherever they are. As of mid-2009, that still amounted to almost 140 countries in the world.
the countries of the Pale of Settlement had the most Jews and also lost the most.
Throughout history, Jews have been expelled from various countries. Some notable examples include Spain, England, France, and Russia. The exact number of countries from which Jews have been expelled is difficult to determine, but it is estimated to be around 109 countries.
The same way Jews in all other countries do.
Switzerland
In most European countries.
No.
Other countries fight with Jews because they are not like the Nazis and the other countries don't discriminate people but some countries still disseminate people because of their race and/or religion and/or their sexuality
Jews do not have missionaries and Jews do not proselytize. Therefore there is no leading Jewish missionary. Jews are in multiple countries because they are in forced exile from their homeland.