Are you seriously comparing conquests and migrations of the 7th century and a thing that happened in our life time? Well, my life time at least... I actually went to high-school with a Palestinian kid who immigrated with his parents to Yugoslavia. His family was kicked out of their apartment and put into a camp and he spent a part of his young life locked there. In his own words the hardest was that the camp was relatively near where they used to live and they could actually see their old building's roofs from the camp, through the wire fence, knowing that someone else now lives in their home. It's a recent event still very alive in mind and souls of Palestinian people, not some ancient story from time when Anglo-Saxons still ruled the Britain and Slavs haven't moved to Europe yet.