About 5 yrs ago I stayed in a villa owned by an old Dutchman in Bali. He was a retired Colonel with NATO. While having a beer he told me that when the USSR crumbled there was a crisis meeting in Brussels. NATO realised with no world enemy there would be no need for NATO. The next year there was a terrorist strike in Africa. He didn't say they organised it, they just let the intelligence slide....
So from what I can figure out NATO are pressing Russia to test their metal. Don't forget the Russians lost hundreds of civilians just a few weeks ago, they are pissed.
The danger in leaving major decisions affecting the whole world in military hands, you get a military response