One recurrent mistake is to think that Palestinians, or Israelis for that matter, are any different from other folks. Wars and civil wars defined all borders of empires, and all nation states of today. The American civil war (1861?1865)between "North" and South" in which 1 million young men were slaughtered on the battle field. A normal Palestinian society or state takes time to evolve.
Former ruling party in Yemen says it accepts UN-brokered peace plan (Reuters)
from the article: Gunfight erupts between Hamas and Fatah forces in Gaza