Let us be clear about the so-called Nakba. First, the Palestinians rejected the offer of a state from the UN and started a civil war and then a full-blown war after Israel declared its statehood. Secondly, there was no official Israeli state policy to drive Palestinians out of their homes in the 1948 war. The Palestinians who fled their homes did so for 3 main reasons: driven out by local Israeli commanders acting independently of government policy; told to leave by their own leaders who wanted to get non-combatants out of the war zones; and, some fled because they believed the exaggerated propaganda of their own leaders about Jewish terrorist group atrocities. So they weren’t all driven out, some left of their own accord. We don’t know how many are in each group because the Palestinians didn’t keep proper records. Also, remember that a similar number of Jewish people left or fled Arab countries for Israel at the same time. They just moved to Israel and got on with their lives instead of moaning about it for decades like the Palestinians.