As with the ethnic cleansing operations, the genocidal policy is not formulated in a vacuum. Ever since 1948, the Israeli army and government needed a pretext to commence such policies.
The takeover of Palestine in 1948 produced the inevitable local resistance that in turn allowed the implementation of an ethnic cleansing policy, preplanned already in the 1930s.
Twenty years of Israeli occupation of the West Bank produced eventually some sort of Palestinian resistance. This belated anti-occupation struggle unleashed a new cleansing policy that still is implemented today in the West Bank.
The Gaza imprisonmentin the summer of 2005, which was paraded as an Israeli generous withdrawal, produced the Hamas and Islamic Jihad missile attack and one abduction case. Even before the abduction of Gilad Shalit, the Israeli army bombarded indiscriminately the Strip. Ever since the abduction, the massive killing increased and became systematic. A daily business of slaying Palestinians, mainly children is now reported in the internal pages of the local press, quite often in microscopic fonts.
✍ “Genocide in Gaza” by Ilan Pappé, September 2, 2006.
https://electronicintifada.net/content/genocide-gaza/6397