Nuclear weapons have become one of the shittiest coercive weapons superpowers have these days, it's in almost all grand-strategic studies and a widely accepted fact in NATO militaries. Doesn't mean we should get rid of them, though. Gunboat diplopmacy still works better, especially carriers.
And granted, the Russian military isn't the superpower Putin wants the world to believe it is, it is rotten with corruption and really it's not that well equipped (save some exception here and there), but the bulk of it is out-of-date cold war stuff not up for major warfighting. This is changing, but it's very, very slowly doing so.
Russia also doesn't have the manpower or the simple fucking money to pay for a major invasion. Europe still has the largest army in the world and yes, they WILL all contribute when the Bear comes crashing the party.
Still, one shouldn't discount the fact that even with old equipment and corruption, EUrope hasn't been preparing for major warfighting for almost 30 years - a fact people easily discount as irrelevant, but almost no air force in europe, for example has trained on a relatively large scale on air-to-air combat against a developed nation since the cold war.
Since the war on terror began, there have been very, very little training missions going larger than a battalion for most european country (until Bison Drawkso, which was a major logistical disaster)
