An ally would never object to the installation or expansion of a defensive system. Clearly, Russia wants Eastern Europe to have no defense from Iranian missiles. That can only mean that the Russians view the Iranians as an ally. Which of course would explain why they are selling weapons to them and helping them become a nuclear power.
>> Clearly, Russia wants Eastern Europe to have no defense from Iranian missiles.
The system is sold as one needed to counter Iran and other would be rogues. In fact it’s real purpose is obviously to contain Russia and China who have the real potential.
The system is global, not limited to Europe and her hinterland.
Why would the Russians want Iran to have the ability to nuke Moscow?
Think about it.