Who is "this expert?"
The idea that China and Russia have such a great interest in the state of Israel that the would collectively give even half of what the US gives is utterly insane. You're being challenged because what your saying is nonsense. Again, even if they could cobble together enough support to find trade deals would pale in to what the US gives for free. The idea that the commitments the US has to Israel are so ironclad that we have to keep sending more bombs to a state committing genocide, shows how absurd your view is.
It's clear you have some significant cognitive dissidence over the reality of what the US is doing to aid an active genocide by a rogue state that committing acts of terror and escalating tensions in an unstable region. With that you've picked some number of experts that support your delusion, and harp on how impossible it would be to stop, on how they would find some other way. There is nothing that would be comparable to what the US gives to Israel, and the US has no obligation to give weapons to those committing war crimes. Stop lying to yourself and admit that this blood is on America's hands.
I suppose my difficulty is in understanding why you're still replying and/or not blocking me. You have no obligation to reply, I am not obliged to ignore yours because you've said you're done. I still have yet to have a meaningful answer from you, so I continue to ask; if not freely given by America, how would Israel get hundreds of billions of dollars in bombs?