Biden can just force a ceasefire any time he wants by just telling Israel he'll cut off funding and arms and intel.
And if they don't listen and try to do their thing (genocide) anyways while being completely cut off for months and months, well that will be when it might be okay to say "genocide Joe did eventually try to rein it in a little".
Edit: I didn't realize I'd receive pushback on ideas I can't defend. Better find a way to be condescending to save face during my cowardly exit.