Now, we have to draw the line some place and that tends to be national governments which is where our direct influence ends.
While we can empathize with N Koreans, for example, we are not the ones who decided upon their government. They are responsible for their self-determination.
When we felt oppression, as a country we fought a war for independence. When we opposed slavery, we fought a civil war. It's a bloody crucible, but you have to forge your own destiny as a nation, unless you're proposing internationalization, which is imperialism by another name.