IDF fights with an extreme superiority in forces, they have around half a million soldiers and are fighting at most a dozen thousand in Gaza, as well as a 50 mile low intensity frontline against Hezbollah/Lebanon.
The total level of threat they face seems similar to the Ukrainian Kursk invasion, if they had similar forces to the Russians that could be fine - but they have 10 times more
On a purely numeric level maybe? But not all 500k are at the front at all time, because they're conscripts. The 50k contingent in Kursk is deceptive. Russia can rotate fresh troops to the 50k whenever they're wounded, 500k is Israel's whole conscripted manpower pool.
While on paper the Israeli force is impressive if mainly in size, in practice it has somehow underperformed a lot, not being able to inflict disabling casualties on even just Hamas.
The individual Russian soldier can call in more fire support, has more vehicles and seems to be better doctrinally prepared as well. Israel is only capable of supporting offensives with around 1000+ munitions hits a day during its peak. While Russia often outputs anywhere from 5000 to 20000+ munitions a day.
as well as total air supremacy, given the lack of f-16 operations in Ukraine it seems plausible they are allocated almost the entire sustained NATO airforce generation.
Officially Israel is not getting any US air support let alone NATO. And if it would happen, it would be highly controversial both for foreign and domestic policy. It does not seem plausible at all that Israel is allocated anything except their own airforce generation, there is no credible evidence or motive for US, let alone all NATO, to provide any of their own.
Israel won't collapse. Industrial nations are very resilient. North Korea and Iran have faced far worse from sanctions and they're doing ok. And with US support, Israel will keep going for as long as that support lasts.
Even in NK's case where US successfully lobbied international reach sanctions, it's not like people there are being actively attritioned by it. Let alone Iran, which is essentially unaffected economically.
The problem for US is that they can't pour in too much support. Stockpiles and wealth are limited.