" Unless you live here, have a Coke and a smile and shut the fuck up."

I can understand why you'd say this, but at the risk of bringing down a whole heap of Spaw opprobrium on my fragile noggin I respectfully disagree. For a start, like it or not the US takes the stance of the leading light for liberty and justice in the world as you say. This means those of us living outside the US have a vested interest in what it's doing and how it conducts it's affairs both internally and externally. So when we notice the fact US politicians make decisions like they did in this vote, we pay keen interest and like it or not are entitled to an opinion, which we can and should voice.

Secondly, I have good friends in the US and I care about their wellbeing very much and that means I take even more of an interest. Your history and ours are intertwined and cannot be separated so easily. Isolationism is a luxury the US can't afford any more.