Historically Jews were not allowed to work in certain jobs. Given some sentences in talmud, guilds as well as some aristocrats reacted by issuing some excluding laws. I am not sure if it is really smart to live behind walls and to bequest the next gernerations with illegaly occupied land. I am not sure if it is really smart to deny 5.3 Million Israelian refugees their right to come home and not to take care for the fate of that amount of Isrealian people.
UN experts: North Korea continues to evade UN sanctions (AP)
from the article: What makes Jews so smart?