They could, they just always, in recent decades, choose to use it in very nearly the same way, with very slight variations.
I mean, the Congress and the Preident together could, on the one hand, declare war on Palestine (either the widely-but-not-US-recognized State of Palestine, or Hamas, or both) on some pretext and radically change the context.
Or, on the other side, they could recognize and arm the State of Palestine, stop all aid and arms sales to Israel, stop vetoing every Security Council resolution that Israel doesn’t like, and sign a defense pact with the State of Palestine.
They don’t do those things because they don’t choose to, but that’s not a lack of power but a lack of sufficient interest and desire in changing the outcome.
He can! $100B is enough to buy god knows how much Kalashnikovs, and ammunition.
We've seen that lies and manipulation can distort reality too much already. Platforms need to be honest to be constructive.
The President of the United States and Congress barely have any influence over what goes on between Israel and Palestine.
Zuckerberg can't influence the Israel-Palestine context one bit, and he has $100 billion in wealth and controls the world's largest social network. He can't make the slightest of difference, no matter what he believes or wishes were. Zuckerberg is entirely powerless. The same goes for Bill Gates, Jeff Bezos, Brin, Page, Ellison, Musk and on down the list.
So the 'influential' people on HN? Whatever is less than zero ability to influence this topic, that's the power they possess.