Neither China nor Russia wants us with a foothold in Central Europe, true. But I can't think of a course of conduct more likely to draw us in than what they have pursued.
I doubt whether we have ambitions to occupy Iran, however, even for the short term. So maybe their best option would be to get rid of the mad mullahs and let us turn our attention elsewhere.
Both countries are within range of Iranian missiles, and subject to attacks by Muslim terrorists. I wish they would stop playing with fire.
Central Asia, not Central Europe.
Duh.