Israel is an ethno-nationalist settler colony with an apartheid system that oppresses Palestinians in every way possible[1], it has unconditional support from the west, and mostly importantly, unconditional support from the US. Hamas and Hezbollah didn't come out of a vacuum, Hezbollah and Hamas were founded back in 1985 and 1987 respectively, Israelis were killing Palestinians long before that, from the Deir Yassin massacre[2] to the Sabra and Shatila massacre[3] and many many more.

[1]: https://www.amnesty.org/en/latest/campaigns/2022/02/israels-...

[2]: https://en.wikipedia.org/wiki/Deir_Yassin_massacre

[3]: https://en.wikipedia.org/wiki/Sabra_and_Shatila_massacre