The weirder thing about any nuclear use, especially by Israel, is what that could even look like.
Israel's nuclear capability isnt totally known; are these kiloton options or megatons, are there dozens of warheads or hundreds, what is the delivery apparatus, what are the targets? We can guess at a lot of these but the reality of what theyre capable of and what the ramifications of use of these devices is nearly infinite.
Not to mention, who would fire back at the colonialist entity? Is Russia going to muster their plentiful supply? America would not, unless it joined in for Israel and hit its own targets. China has very little reason IMO to commit, especially when it might be the most affected by potential fallout by even a limited exchange. Pakistan? India? Does Turkey liberate the US missiles on its territory and use them?
The US neocons in charge of imperial policy are collectively arrogant but not collectively nihilistic, they have a ceiling and while their brutality has wrong-footed many of us, they still want the neoliberal global economy to tick along, regardless of their miscalculations that imperil it.
They dont have to be collectively nihilistic, just enough of them at any one time in the right places can end all of humanity. We got too close and very lucky in the Cuban Missile Crisis. We might be closer than we think already.
This is why active diplomacy is so frowned upon by the natsec people. When you talk to people you learn that they are human, and that you should work together for common good and common cause.