Should Europe have its jews back?

Maybe everybody should return to the lands of their ancestors: Europeans to Europe, Chinese to China, Asians to Asia, Africans to Africa, Jews to Israel, Arabs to Arabia. How would the world look then?
As I am English, my ancestors would come from Germany.
My neighbour would be back to Pakistan.
The Americas would be interesting - Aztecs etc
Africa - not sure how that would look.
Australia would be nearly empty; New Zealand totally so as both the Maoris and Europeans are immigrants.
All the Russians would be in Muscovy
Interesting concept.