You don’t think Russia and China stand to benefit from Israeli knowledge of US arms technology? What about the massive PR win for Russia? They already use an imagined Nazi threat to justify their wars of aggression.
There are three regional powers in the Middle East. The US has Israel and Saudi Arabia, and Russia has Iran. You don’t think Russia wants to flip that math? Controlling that much oil would eliminate whatever vulnerability they have to sanctions.
Israel is hardly discredited, whatever the hell that means. Maybe in Internet culture, but not in geopolitics. Russia is doing almost exactly what Israel is on a much broader scale right now. The International community cares about as much about the Palestinians as they do about the Rohingya or the Darfuri, both of which are suffering ongoing genocides that I bet you didn’t even know about. The world should care, but it really doesn’t.
The problems in the Middle East are about a lot more than US meddling. Much of it goes back to before the US even existed. Not that the US has helped much, but it was the British Empire that setup ridiculous borders that all but guaranteed eternal conflict.