Given that the slogan of DEFCON is "Everybody Dies" and the slogan of Nukefix is "The Challenge Is To Develop a Safer World", I think they have somewhat different victory conditions... As a resident of one of the nine countries possessing nuclear weapons, I'd prefer that people gave the latter slogan more attention than the former!
Unfortunately we enter into new era where MAD is no longer applicable to Russia. Their sarmat has 100% effective target couple woth superb AD while current ICBMs operations tested in America and UK are absymal with equivalent ineffective THAAD and Patriots. It is interesting to see how this asymetrical MAD will play out in coming years.
Russian air defense is abysmal; Ukraine is now regularly slipping dronified Cesenas through it. Rest assured that American Ohio class SSBNs and SSGNs will be able to ruin Russia if they try anything stupid.
