The one that I'm at a complete loss for is Uruguay - it is one of the wealthiest countries per capita in South America as well as the least corrupt and most egalitarian... not exactly a huge source of desperate immigrants. Did their government scold ours too harshly for the recent Venezuela shenanigans or something?

Well given that the US DHS is posting on social media that it intends to get rid of all 100 million non-white Americans. What exactly did you expect?