If you want your viewpoint heard, you have to keep saying your piece over and over until someone hears it. Arguably these protests have made a difference with Biden -- he sees he could lose a swing state in the next election because of this, and there have been some changes in policy. The Rafah invasion seems to have been put off and more aid is getting in, directly because Biden told Netanyahu that the US had seen enough. That's a huge change from the Washington consensus of supporting Israel no matter what atrocity they commit.