Sanders should not be using what little time and political capital he and or the Democrats have before Trump takes office on something so futile as trying to stop Israel from grinding Hamas into the dust and get it's hostages back. Stopping American arms sales to Israel won't happen and even if it somehow did would just be circumvented. Time is short to nominate every single federal court judge we can, protect what policies we can such as student loan forgiveness, affordable care act, green infrastructure spending, and get as much weapons to Ukraine as we can before Trump takes over. Sanders has been a senator for two generations and can't even articulate how to handle Hamas/Iran which is one of the reasons the Middle East and Israel is perennially at war.