Everyone with their panties in a twist about this type of missile deployment does not understand the concept of "mutually assured destruction".

Any strike against the US would be answered with the total destruction of the country that launched the attack. That concept is what has prevented nuclear war since the end of WW II. Nothing has changed in that regard.

The DS might be evil and stupid enough to launch an attack under those circumstances, but no nation-state would do so, for their own survival.