Israel created Hamas as part of its divide and conquer strategy in Palestine:
Blowback: How Israel Went From Helping Create Hamas to Bombing It
This isn’t a conspiracy theory. Listen to former Israeli officials such as Brig. Gen. Yitzhak Segev, who was the Israeli military governor in Gaza in the early 1980s.
"Segev later
told a New York Times reporter that he had helped finance the Palestinian Islamist movement as a 'counterweight' to the secularists and leftists of the Palestine Liberation Organization and the Fatah party, led by Yasser Arafat (who himself
referred to Hamas as 'a creature of Israel.')
"'The Israeli government gave me a budget,' the retired brigadier general confessed, 'and the military government gives to the mosques.'
"'Hamas, to my great regret, is Israel’s creation,' Avner Cohen, a former Israeli religious affairs official who worked in Gaza for more than two decades,
told the Wall Street Journal in 2009."