Something that struck me a while ago is that while most of the modern world talks about protecting "human rights", the ruling classes in the US always seem to talk about protecting things like "Constitutional rights" or "citizens' rights". I'm not sure what that says about their underlying attitude, but it can't be good.
The trouble is, a lot of places have at least tendencies in the same direction, it's just hard to see them if you're a native and get to go in the "EU citizen" queue at customs or whatever it might be, so you don't see how others visiting your country are treated even from the moment they arrive. And since typically those outsiders have no direct influence on policy in places they visit, there is no natural political incentive for each country's government to treat them as much more than a source of revenue for the tourism/education/commercial sector.
With the rise in modern times of ubiquitous international communications networks and relatively quick and easy physical travel between countries, unfortunately this seems to be a race to the bottom, with a lower bound determined only by the point at which people actually stop visiting/communicating with your country, which as a practical matter is going to be difficult for many people to do.