It depends on what you mean by "native born".
If you are referring to Jews born on the soil of that country, regardless of whether their families arrived in Western Europe at some point in the 20th century, the answer would be France.
If you are referring to which Western European has the largest Jewish population that is "ethnically indigenous", that would be the United Kingdom, whose Jewish population is mostly several centuries old and seen as "British".
If by "native born" you are trying to separate Jews who have Jewish ancestry for centuries from recent converts, this is a non-issue. The amount of people converting to Judaism is a trickle, so it does not change numbers.
Many fled to Western Europe.
Jews were distributed all over all of Europe, but the largest concentration lived in Poland and western Russia.
Many came from western Europe, from when they were expelled during the inquisition.
Many fled to Western Europe.
Jews came to Eastern Europe to escape prosecutionin Western Europe. Poland, in particular became a refugefor Jews because their liberties were protected there.
Predominantly Catholic but there were Protestants and Jews in Western Europe during this period as well.
Many German Jews were sent to Auschwitz. Others were slaughtered in Belarus and the killing fields of Latvia.
There are no Pakistani Jews living in Pakistan anymore. The only Jews there are Israeli expats. The Karachi Jews now live primarily in Israel with minority populations in Western Europe and the USA.
To wherever Jews went in their exile: Western Asia, Europe, North Africa, and later to America.
Western Europe made a quick recovery because of what Hitler did at the Holocaust. Most of western Europe was against Hitler, and helped save the jews. In respect for all of the countries that helped get rid of hitler, the jews started a repay fund to repay all of those countries and help build back anything that was destroyed. Sources: I'm a history major
Jews are native to Western Asia. Modern Jews, however, do not acknowledge their heritage as Arabs and claim to be White.Jewish answer:The above anonymous answer contradicts itself, since Western Asia has as its native groups not only Arabs. We Jews are indeed natives of Western Asia, as DNA tests have shown; and we have never concealed or denied that fact. Jews and Arabs are related and are both Semitic, and neither group claims to have had its origin in Europe or as Caucasians.
The people who took refuge in Poland during the Late Middle Ages were Jews form various parts of Western Europe. There is a link to an article on the history of Jews in medieval Poland below.