He’s fought us every step of the way as we tried to reign in Iran’s nuclear development program. China did as well. Russia provided help building nuclear power plants. It then provided cover as Iran started using centrifuges to refine materials to the point they weren’t useful for anything much other than nuclear weapons.
He would not cooperate with us at the U.N. He seemed to relish his image more than his own neck, and the lives of his people.
Russia is allied with Iran, but when they helped China develop nuclear power, China applied that “help” to develop its own nuclear weapons. Russia has been extremely cautious ever since.