This is pretty ignorant of the capabilities of the nuclear triad. At some point, any missile defense system is going to have to estimate damage and pick some t

This is pretty ignorant of the capabilities of the nuclear triad. At some point, any missile defense system is going to have to estimate damage and pick some targets, but leave others. When there are multiple vehicles,.you're pretty much fucked. The idea that a missile defense system can prevent full-on nuclear warfare is false. It's meant for one-off strike deterence, not for full on war. If you don't stop a nuclear launch vehicle when it's on the ground or very shortly after launch, your chances at stopping it are slim.