I don't know if your read the article but Mr.Loewy got reparations, what did Arabs get ? It makes no difference whether these Arabs lived in the holy land since 16th century or were economic migrants, there is absolutely no reason they should let go of their keys. And that goes for millions of Jews which were kicked out of Muslim countries. However, the honest question they must ask themselves is why do they want to go back to the holy land. Is it because they are hoping to restore their belongings or because they relish to restore the situation where "Jews were our dogs" ?
In Cameroon, suicide bombing toll rises to 19 dead, 143 wounded (Reuters)
from the article: Israel must remember the Holocaust's refugees, forever changed