Well, in defence of Iran, it hasn’t went further empty oral threats in it’s hostility towards US recently. Iran is also at war with extremist islamist groups who actually harmed Americans (AQ, Taliban, MB).
It worth mentioning that Iran is still a functional republic with public politics, elections etc. For that reason I can’t see mullahs’ reign as something infinite. It may change for good.
Can’t say same about Arab Spring legacy.
And about the only goal of the Arab Spring that I can discern, is the goal of unleashing chaos in the region. So with regards to harming Sunni Nation States, letting the EU/DC Kleptocrats do their thing, might be the best option to harming the Sunni. The worse enemy the Sunni Nation States have is apparently a friendly EU/DC. Just look at what the EU/DC have done for them the past year or two.
But then again, if the EU/DC goal is to unleash chaos within the Sunni Nation States, that goal has been achieved. The end result of this chaos will be these previously stable Nation Sunni States will become controlled by Sunni Terrorist organizations. So the Russians do have a point. The region would have been far better off without the Arab Spring.