Del Boy's got a point too.
I know it's not the case but what IF the indigenous people of Australia and New Zealand demanded that the "Whites" "go back to where they came from"? I've heard the argument that the Maoris are so mixed now it hardly matters but what if it wasn't the case? What if these indigenous people started blowing things up in downtown Sydney and launched rockets into the suburbs from their reservations?
What would you do?
There are now generations of Israelis who know no other country for a home other than Israel just as there are Australians and New Zealanders who know no other country other than their own. Granted, the number of generations that have lived in that land are different but you can see the similarities as well.