I really don't think that's the case. America has murder tens of millions if not hundreds of millions to hold on to its role as world hegemon. This was a bipartison effort. This phase of the Israeli genocide began under Biden and he supported it with everything he had because Israel is critical to maintaining US hegemony. If the democrats were giving full throated supported to genocide in the name of maintaining the US position what makes you think like this? The bourgeoisie doesn't just had over the baton of power, you have to fight them for it.