Unfortunately, that isn't likely to happen. Netanyahu has, to date, handled Trump deftly and Rubio's current presence in Israel seems to be aimed at offering support to the ground offensive, not opposition. I honestly have no idea what kind of backlash it would take to shake U.S. support for this genocide.
For many people that's amazing.
Israel also has a law that says that the right of self-determination only belongs to its Jewish citizens- it calls itself the Jewish state. I would be entirely for a one-state solution with equal rights for everyone, but that thing cannot be Israel.
And you think they should just walk away from the hostages? If Hamas released the hostages the world would soon make Israel quit. But as it stands why in the world should they be expected to give up?