“The deployment of the RS-24 missiles, which have a detachable warhead, strengthens the military options of the Russian missile forces in overcoming missile defence systems.”
So basically they are threatening us with an offensive missile attack because we are deploying a missile defence system?
Deterrence Mandrake! Its all about deterrence and the purity of precious bodily fluids. If you can defeat the delivery of an opponents nuclear warheads then it makes you more likely to attack your opponent because mutually assured destruction isn't assured anymore.