Definitely not an isolationist, more of a money baller. Looking for the biggest interests for the smallest investment.
Your history on sovereignty is a bit off. Sovereignty came from the peace of Westphalia (hence its often called Westphalian sovereignty) and was one of many rules instituted by belligerents to protect larger states who were seen as more capable of governance. The other common rules were embracing standing armies, rules against political assassination, and the beggining concepts of balance of power. All of these conclusions were reach in Europe first but not by accident. Europe balkanized after the fall of Rome which caused it to develop hard political boundaries far earlier than the rest of the world. It's one of the reasons that makes discussing issues of historic sovereignty difficult with China. The eastern empires of China and India didn't really have hard boundaries. They just expanded into new territory until their power faded from its capital centers of gravity. So China did control some contested territories at some historical points in history but not in the same sense of control we think of. More so that those areas were just close enough to Chinese influence that it made accepting governance more beneficial for them.
In all of the above mentioned rules (sovereignty, balance of power, no assassination, standing armies) there was an underlying theme to remove international power from smaller states and embody it in larger states. The whole idea of great powers and their satellites. It was believed that a few great powers could negotiate security more effectively that a conglomerate of states with straying interests.
In any case, none of that is really important today. What is important is the recognition that sovereignty is relatively new in geopolitics, and like other political constructs, it will eventually fade to be replaced by something else. There is already emerging evidence to show that human networks that are transgeographic are beginning to erode sovereign power on global affairs. (Think anonymous) Now is that something that happens in our lifetime? Probably not. Is it something that happens in a few hundred years, probably.
Personally, I see sovereignty for what it is. A temporary political construct that does the bare minimum to prevent descent from chaos but has little upholding it from being a hard and fast rule. Very few people on here are arguing to make the US a pariah state after violating Iraqs sovereignty over WMDs, a charter of war most of the world saw as an excuse to get oil.
Also noone upheld sovereignty when we went into Syria to eliminate ISIS. And we certainly aren't offering to pay reparations for damages caused there.
If I go back even further we can talk about Iran, Cuba, Guatamala, or the dozen other times we deliberately ignored sovereignty to meet state ends.
So while it sounds all rainbows and unicorns to uphold this crusade to defend sovereignty I think it's a bit misguided because in reality we want to maintain the capability to "interpret sovereignty differently" when it meets our needs as well. Or so I presume.