The inevitable surge in crude prices is manna from heaven to Russia right now. --Not really seeing why they would want to stop it.
That's true. It's entirely in Putin's interests to see a protracted conflict between Israel and Iran and their supporters/proxies in the Middle East, for many reasons:
- It distracts the governments of major world powers, especially NATO/AUKUS
- It inflates crude oil prices, and if it continues for a long while, other energy and minerals too
- It draws world attention away from the death and destruction in the Ukraine/Russia warzone
- It gives Putin opportunities to look "tough" and "statesmanlike" on the world stage or even try to play "peacemaker" - he will no doubt posture against Israel to curry favour with Islamic powers, but I'm sure secretly he would be happy to see conflict go on longer.
I also agree that it's not in the interests of either Russia or China to intervene. They would be better placed to stay on the sidelines and watch the "West" exhaust itself trying to mediate between the two sides and play the dirty political games that trying to resolve the whole mess in the region will drag them into (again). They may covertly provide support to Iranian-backing elements through purchasing weapons and materials, and providing intelligence for example (I can imagine Russia especially continuing to do this), but I can't imagine either providing direct support.