The IRGC and Iranian leadership assume that since Israel is just one nation, and not a big one, that they really really want to annihilate, it should be no big deal for everyone else to accept. But that is a dangerous, even existential proposal on both sides, as the IRGC knows, partly because the US position worldwide is about projecting security for partners.
Iran actually occupies a mirror position regarding the Palestinians, who have fought and suffered greatly. So Iran strives to reverse the positions of the Israelis and Palestinians— not to raise all ships, but swap them— which isn’t a moral cause from an impartial perspective, it’s just picking a different winner.
The US and Israel sought peace through negotiations for decades regarding the Palestinians, while Iran has continually plotted and waged war, which it now has on its home soil. The US and Israel have genuinely sought to peacefully resolve the situation, while Iran has not, not in my lifetime.