Many were forced, others were encouraged to 'return' to Israel by the GOI or its agents. Whichever, that is not an issue for the Palestinians or PA - they didn't force anyone out of Morocco or Egypt or anywhere else. If Israel has a claim, it needs to take it up with the governments responsible or via the international courts. The only refugee issue involved in the Final Status Agreement is the 715,000 Palestinians and their descendants.
Man shot dead in northern Israel town of Bi'ina, police say the murder was gang related (Haaretz)
from the article: Haaretz exclusive: Olmert's plan for peace with the Palestinians