The article Noam cites is called "Why the Ukraine Crisis Is the West’s Fault" can be found here:
Why the Ukraine Crisis Is the West’s Fault
The Liberal Delusions That Provoked Putin
By John J. Mearsheimer
"According to the prevailing wisdom in the West, the Ukraine crisis can be blamed almost entirely on Russian aggression. Russian President Vladimir Putin, the argument goes, annexed Crimea out of a long-standing desire to resuscitate the Soviet empire, and he may eventually go after the rest of Ukraine, as well as other countries in eastern Europe."
"But this account is wrong: the United States and its European allies share most of the responsibility for the crisis. The taproot of the trouble is NATO enlargement, the central element of a larger strategy to move Ukraine out of Russia’s orbit and integrate it into the West."
https://www.foreignaffairs.com/articles/russia-fsu/2014-08-18/why-ukraine-crisis-west-s-fault