Prior to the creation of the PLO when arabs suddenly became palestinians for political purposes the original palestinians were jews who had been living in the region for the past 2000 years. Before the formation of the PLO who created a palestnian people to give the group some kind of legitimacy most the original refugees defined themselves as arabs. They were not some kind of seperatre race which they have since become thanks to politics.
Nobel medicine prize awarded for work on parasitic diseases (Reuters)
from the article: Hamas official facing expulsion: I won't leave my ancestral home