sorry but Scott Ritter talks propaganda and sheer rubbish and what he says here is incorrect in the extreme (which is the norm for ritter )
1. Israel actually has more capable missiles than Iran , though Iran has more 2.the US certainly do have missile defence for ballistic missiles 3.Strategic nukes trump tactical nukes by many times
if you wish to verify these thngs it isn't too hard ......but if you wish to simply believe rottter , not much can be done for you