Your words betray the fact that you have done no research on the subject before deciding to speak on it.
This isn’t merely about reclaiming land that was stolen (though what the fuck is wrong with that). Israel is an apartheid state. Palestinians are treated as subhumans, on their own land.
Even if we ignore the genocide that is currently in motion, the conditions of Palestinian treatment under Israeli rule is not tenable in the least, and has never been tenable.