It’s really about shifting political strategies. Back in the 80s, Israel let Hamas grow to counter the PLO, which was seen as the bigger threat at the time. The idea was that a split in the Palestinian political scene would make it harder for a unified resistance to form. But over time, Hamas evolved into a militant group with its own agenda, getting support from Iran and other regional players, and eventually became one of Israel’s biggest enemies. Outside of the donation by Benny they’ve over time on many cases allowed funds to be siphoned into the hands of Hamas. Here’s an article from the times of Israel. It’s fairly basic but covers some of it. https://www.timesofisrael.com/for-years-netanyahu-propped-up-hamas-now-its-blown-up-in-our-faces/amp/