They study hard to gain skills. When they have them they can't find employment. This leads to despair and frustration that boils to the surface with violence like suicide bombings. Palestinians see themselves as cut off from the world. The future is uncertain.
Extermination looms as a reality.
They are especially disappointed the United States hasn't been more forceful in insisting Israel live up the Oslo Accords. Perhaps not so coincidentally, when all the Middle East waited with bated breath to see if President Clinton would lay down the law during the Arafat-Netanyahu visit to Washington, the Monica Lewinsky bomb was lobbed into the middle of negotiations.