Under current circumstances, neither Israel nor India are going to even try to attack the US. Pakistan might be tempted, but I believe they don't have a ballistic missile capable of reaching the US. So there was less reason to do anything about them. (Iran, now, is more worrying.)
> If someone in Japan or South Korea think the same, that they are truly protected with this shield...
But I don't think anybody believes that. Could it stop a North Korean nuke? Hopefully, yes. Is anyone confident enough to want to try it? I doubt it; nobody believes that ABM defenses are anything like 100% reliable.
> And btw North Korea probably has more that just 1-10 or even 100 nukes at this point.
I think it's about 10-20 warheads. Do they have 10-20 ICBMs that are operational? I doubt it, but I don't know for certain.