It’s hard for them to not take it personal when you talk about the country as a whole. I’m Mexican, and I lived in Argentina. Like some of Snoopy If you can’t say anything Nice we should probably be friends shirt you clearly didn’t travel past Buenos Aires. The “interior” has some of the most welcoming and nice people to ever exist. Being mexican I’m very used to a whole lot of human interaction which have made me feel awkward in other countries, but not there. Also, it is true to say that some argentinians will consider themselves “better” than those from Paraguay or Bolivia, I did experience this, BUT this happens all around the globe and it is not fair to say that “argentina is one of the most racist countries”. If you ever go back, try going to other provinces, you will find many beautiful people.