Merriam-Webster:
the deliberate and systematic destruction of a racial, political, or cultural group
How are the Palestinian communities not being deliberately and systematically destroyed? There is no "oopsie doopsie I just blew up and later colonized your homes" caveat. Also, had it not been for the US blocking resolutions, the world community, including the global south, would have denounced Israel long ago through the UN, opening for possible peace keeping troop deployment.