Today Saudi Arabia issued one of their most powerful statements against the US plan, shortly after Netanyahu gave an interview saying that Saudi Arabia is large enough that a Palestinian state could be created on Saudi land. They reaffirmed the inalienable rights of the Palestinians to a state and called out the "extremist occupying mentality" who lack understanding of the Palestinians connection to the land.
https://x.com/KSAmofaEN/status/1888451414717788364
There seems to be a general realisation in "US aligned" regimes in the region, that they could be next. It seems that someone has finally remembered Real politik embodied in the famous Henry Kissinger quotes:
"It may be dangerous to be America's enemy, but to be America's friend is fatal"
and
"America has no permanent friends or enemies, only interests"
They were "quiet" or issued lukewarm rebukes during the last 16 months as they thought they had a seat at the table, now they're realising they too could be cut loose. It's sad that the deaths of 62'000+ Palestinians and thousands of Lebanese had to happen.
Trump had also demanded that the Saudis increase their oil production to tackle inflation and lower prices, especially in America, they haven't.
There's a geopolitical realignment happening to different axis of influence. Trumps behaviour is just going to accelerate the changes.