Thumpalumpacus
Major
Obviously its consequential, but as I've said, it's not the sole driver behind NATO's past actions. He's simplifying the causes of each of these situations with a broad stroke of the brush, hence the "glib" statement. Why wouldn't NATO be cautious about Russia's nuclear weapons? But to assume that NATO acted in previous scenarios simply because they didn't have nuclear weapons (again...) doesn't take so many other mitigating factors into consideration.
Right, and this is indeed where we agree. The actions in the past had other positive motivations (stopping genocide in the former Yugoslavia, redressing the attack of 9/11, and so), but in this case there is a negative motivation that simply was not there in those instances -- a nuclear-armed opponent -- that mitigates against NATO action today.
Had any of those other opponents held nukes, you can bet that NATO would have been much less solid in response. Had any of those other powers had the ability to strike NATO countries with a nuclear response, I doubt NATO would have taken the actions it did in fact take.
NATO didn't act only because Libya or Serbia lacked nukes; the motivation was clearly outside that. But had either nation possessed nukes, I'd be willing to bet NATO's reply would have been very different; and I'm willing to bet that it's only Russia's nuclear forces which are holding a NATO response at abeyance today.
NATO is generally defensive in nature, to be sure. But how willing it is to be active in defense is surely affected by a potential nuclear response. I think it's fair game to point that out.