That's not how international geopolitics works. There are many means in which nation states pull levers to take on problems that exist in other countries. Sanctions, diplomacy, trade barriers, propaganda, military interventions, threats, etc. are all tools that are used by nation states around the world every day.
Why should they not be like that? Absolutist non-intervention is not a realistic strategy in a universe where nation states border each other and their actions affect each other.
Germany waged war on just about the whole world, the response to that was one of defense, not offense.
> Germany waged war on just about the whole world, the response to that was one of defense, not offense.
I find it useful to distinguish legality from morality of the move of capturing Maduro and his wife.
One way I approach it is to ask myself: if one could have Maduro returned to Venezuela today, would one? Perhaps the answer that most people would give is yes (i.e. everyone would be better off), but I'm not so sure.
I'm not sure who Trump is doing favors for here, but much like when it was Bush doing favors for Haliburton, we could end up with decades of pointless war which neither of the corrupt parties that started it take any responsibility for cleaning up.
Whether through politics or sabotage, its appropriate to intervene if somebody is about to stick you with the bill for something like this. We can't be all "boys will be boys" about it. The consequences are often too severe.