The difference, Jean-Marie, is that Israel came to them, they didn't move to Israel. This was their home before it became Israel. It makes all the difference in the world, and essentially means them becoming expelled from their homeland.
Wes Craven, director of 'Scream' and 'Nightmare on Elm Street', dies 76 (Haaretz)
from the article: Israel stripped thousands of Jerusalem Arabs of residency in 2008