None of that old stuff has any relevance. When the new state of Palestine was defined by international borders in 1922 that was the official beginning as it was for all the other new states in the region.
All of the people whose normal place of residence was inside those borders at that time were Palestinians. What happened 10 years before or 1000 years before simply does not matter.
HEAR YE!! HEAR YE!!! TINMORE HATH DECLARED 1922 BEGINING
AND END OF HISTORY-----any "LAND" mass which existed that day---
and its existing population (and descendants) which had DEFINED
BORDERS (in that year--1922) DEFINE THE WORLD FOREVER and
IT's FOEVER LEGAL EXISTENCE ---ANY BORDERS ALTERED, OR STATES
DECLARED, OR POPULATIONS SHIFTED 1922 SHALL BE PERMANENTLY
ILLEGAL !!!!!!!!
(muslim arabs living within the borders of the land mass called
"palestine" shall be called "palestinians" as of approximately
1960----whether they like it or not---as many official papers
regarding this issue ---which do not support this "fact"
are now declared NULL AND VOID)