I doubt Europe is really afraid of war/nukes, it's the oil and gas that they worry about.
Quote from the Telegraph:
"Mr Putin is reputed to have once said that Russia no longer needs nukes; oil and gas make a far better weapon. America’s energy revolution has made this less true than it was, but the point still has a great deal of force in Europe. Abundant natural resources provide Mr Putin’s Russia with all the cover it needs to go waltzing around in its own backyard, doing more or less whatever it pleases."
Quote from the Telegraph:
"Mr Putin is reputed to have once said that Russia no longer needs nukes; oil and gas make a far better weapon. America’s energy revolution has made this less true than it was, but the point still has a great deal of force in Europe. Abundant natural resources provide Mr Putin’s Russia with all the cover it needs to go waltzing around in its own backyard, doing more or less whatever it pleases."