The biggest myth perpetuated is that NATO and the West cannot supply Ukraine with what it needs to fend off Russia, while simultaneously supporting Israel. What the two nations need in terms of war materials are very, very different.
What does Ukraine need to fight their war and drain the Russian army of resources?
They need tanks, infantry fighting vehicles, armored personnel carriers, demining equipment, modern artillery, larger quantities of artillery shells and mortar rounds, massive amounts of cheap drones, sufficient quantities of F-16s, air launched cruise missiles such as JASSM and TAURUS, sophisticated, guided ordinance such at ATACMS GMLRS, GLSDB and above all else, a consistent flow of air defense systems, missiles and ammunition. Lastly, Ukraine needs large quantities of funding to keep their country running while at war... The West lacks none of what I listed above. It simply requires the political will power, manifested in action, for Russia to be forced into an unwinnable war.
Do you realize that in 2024 alone the West could send Ukraine 1500 MBTs, 1000 IFVs, 1000 APCs, 500 artillery systems, 2 millions artillery shells, 500 ATAMS / ATACMS and cruise missiles, 100 F-16s with signicant quantities of air-to-air, and air-to-ground weaponry of numerous types, thousands of anti-armor weapons and hundreds of air defense missiles... Without removing a single item from their active war time stockpile?. They have have items have excellent war materials in storage that they're not even using and don't intend to use in the future. For about $100-$125 Billion usd they could essentially re-equip the entire Ukrainian army and air force, including 200,000 new recruits, while remaining perfectly capable of fighting a second war of their own.
Keep in mintheyat the West has also frozen $300 Billion usd worth of Russian foreign assets. Those assets will largely be liquidated to rebuild Ukraine, however, a portion of then could be liquidated in the immediacy to give give Ukraine and insane boost to their war chest that would allow them the purchasing power to add even more to their military resources than I listed above.
What does Israel need to fight their war against Hamas and their allies?
The Israelis need large quantities of guided and unguided air launched ordinance such as JDAM equipped 500lb, 1000lb and 2000lb bombs. They need large quantities of hellfire missiles and APKWS for their attack helicopters and drone fleet. They need a modest number of artillery shells. But above all else they need Naval support from their allies, and the willingness of countries like USA, Britain and France to use submarine and ship launched missiles to make surgical strikes and for carrier and land based aircraft to to bolster the Israeli Air Force in pounding enemy positions with air launched ordinance.
These are very difference wars, being fought using very different military resources. There is little crossover between the supplies required by Ukraine to stall the Russian advance and the supplies required by Israel to continue their power projection. Ukraine needs roughly $100 Billion usd worth of support each year, combined with their growing war spending. Israel probably needs $25-$30 Billion usd worth of support to keep up its war effort for a prolonged period of time. I can't tell you little small of a sum of money that is when you're talking about 30-40 countries splitting the bill. Combined, those countries spent TRILLIONS on Covid-19 when they took seriously. All it would take is for the West to take both of these conflicts seriously for it to be a really rough time for both Russian and Hamas.