https://en.wikipedia.org/wiki/Israeli_support_for_Hamas

Israeli backing of Qatar sending millions of dollars to Gaza

Qatar started sending money to the Gaza Strip on a monthly basis in 2018. $15 million worth of cash-filled suitcases were transported into Gaza by the Qataris via Israeli territory. The payments commenced due to the 2017 decision by the Palestinian Authority (PA), an administration in the Israeli-occupied West Bank and rival to Hamas, to cut government employee salaries in Gaza. At the time, the PA objected to the funds, which Hamas said was intended for both medical and governmental salary payments. In August 2018, Israel's government approved the agreement.^[6]

Israeli Prime Minister Benjamin Netanyahu has defended allowing transfer of millions of dollars to Hamas-run Gaza despite criticism from within his own government, including the education minister Naftali Bennet.^[7] After the 2023 Hamas-led attack on Israel, Netanyahu went on record denying the claims that he facilitated financing of Hamas in order to create a 'divide and conquer' situation. He also said that he transferred funds to avoid "humanitarian collapse" in Gaza.^[8] Israeli intelligence officials believe that the money had a role in the success of 2023 Hamas-led attack.^[9]

https://www.timesofisrael.com/for-years-netanyahu-propped-up-hamas-now-its-blown-up-in-our-faces/

For years, Netanyahu propped up Hamas. Now it’s blown up in our faces

The premier’s policy of treating the terror group as a partner, at the expense of Abbas and Palestinian statehood, has resulted in wounds that will take Israel years to heal from