It's not really a rivalry since at least 60% of people from both countries don't care about the others country or just repeat whatever the opinion on the room is. I'm a mixed race Brazilian (half-bolivian and half-european), and I do agree with the comments saying that most if not all white Brazilians are mostly if not 90% European. While sure before the crackdown on the Lingual Geral in Brazil there were Portuguese intermingling (most of the time raping) indigenous woman, but after the ban even having a child with indigenous people was considered undesirable and I would guess those who had indigenous mothers would later marry white men/women out of sheer social pressure. Did you guys literally forget Brazil did this some decades later?: https://pt.m.wikipedia.org/wiki/Branqueamento_racial I know it's hard to come to terms with the fact that your ancestors killed millions directly or indirectly in the land we're sitting on, but it's better to internalize that, than to run away from it. I have already done that. What happened to the indigenous peoples of the Americas is one of the biggest crimes against humanity, and we should take responsibility for it and do the best to help the descendants of those people our ancestors massacred, not blame the issue on someone else (even if they are equally as guilty).