His OWN failings and lack of credibility aside, Kerry CANNOT be effective because by now, the whole world is fully aware of the utter and routinely demonstrated US habit of mishandling sensitive information...our own and everyone else’s!
Everyone wants to keep Americans as far away from what matters as possible.
Can we blame them?
I think that’s the contribution of such “internationalists” to a “multipolar world”. If they destabilize the entire planet, especially by bringing down the USA, they probably think that they can bring their revolution to every corner of it—the ultimate “beneficial crisis” in their view, although they don’t seem to know what the real result will be.