Why would Russia help with Iran?

So we decide to scrap our missile defense shield today. Why? Oh, Joe Biden has an answer for us:

“The whole purpose of this exercise we are undertaking is to diminish the prospect of the Iranians destabilizing that region in the world. I am less concerned — much less concerned — about the Iranian potential. They have no potential at this moment, they have no capacity to launch a missile at the United States of America.”

Oh, well that’s good to know. At least the U.S. is safe.

We also know that Russia didn’t want us to put a missile defense system in their ‘back yard’. According to Fox News (tv), when Obama visited with Russia, much of their talks were about the missile defense system. So maybe we are also doing this to appease Russia in exchange for their help with Iran. But why would Russia of all countries help to disarm Iran of nuclear capability, when in fact they helped Iran to create it?

“Russia is helping Iran build its first nuclear power plant as part of a program Iran says is purely peaceful. The United States and Israel say it is meant to develop atomic weapons.”

Honestly this makes absolutely no sense. Robert Gates says that Iran isn’t developing long range ballistic missiles as fast as the US had thought. But if we know Iran is already building nuclear weapons, wouldn’t it make sense to assume that they will eventually get long range ballistic missiles? Don’t we want to prepare for the future?

I know the ideology of some in the administration is if we put down our nukes, then others will do the same. In fact, these slides are from a powerpoint presentation from John Holdren back in 2007:

But this just doesn’t jive with the practical nature of what we are dealing with. I’m no expert on foreign affairs, but I don’t know anyone who thinks Iran is not a threat. And I sincerely hope that as our current administration seeks to negotiate with Iran and Russia, that it won’t be at anyone’s peril.