Avner Cohen, former head of religious affairs in Gaza: “Hamas, to my great regret, is Israel's creation.” He stated Israel encouraged Hamas as a counterweight to Fatah and the PLO.
Yasser Arafat, PLO leader, called Hamas a “creature of Israel” in a 2001 interview.
Efraim Sneh, former Israeli Civil Administration director: Admitted in 1992 that Israel saw Islamists as a “social force” that could counter leftist Palestinian factions.
Yitzhak Mordechai, former head of Israel’s Southern Command: Said he was “shocked” by the number of mosques built in Gaza and confirmed Israel’s strategists supported Yassin’s organization.
https://www.ssimovement.org/uploads/2/3/8/3/23838525/left_claim_israel_created_hamas.pdf
https://www.analystnews.org/posts/how-israel-helped-prop-up-hamas-for-decades
https://en.wikipedia.org/wiki/Israeli_support_for_Hamas