I think that is the idea, whether u agree with u or not. Missiles launched to anywhere - including Russia. Hence the alleged need for the siting. theoretically WOULD be intercepted. I don't think WWW III is going to start overvthis. Not between Russia and America anyway.
Maybe the US is playing mind games with Russia and trying to shows who's boss. The problem is if it went ahead its not the US that will be targeted but Europe. We all know the US prefers to fight its battles on foreign soils and we fall for it.