Who doesn't realize that Brazil is behind on any issue when it comes to the U.S.? It's the United States of America
And no the commonalities based within your premise are oversimplified.
- The situation with the natives is completely different than the U.S. seeing that they form a significant part of the population and are a significant factor at least politically in the majority of Latin America (and some even still retained their culture untouched from modern civilization unlike what's left of the native tribes in the U.S.)
- The slaves that came to the U.S. were mainly from modern-day Nigeria,Ghana, Benin, while the slaves in Brazil were mainly from Congo, Angola, Mozambique (aka different cultures, peoples and customs with different identities and responses to slavery)
-And just like the African slaves weren't all part of one monolithic group, the same applies for the European settlers. U know already about the first European settlers to the U.S. and how they helped influence the path of this great nation. On the other hand, Brazil was a Portuguese colony with a similar colonial style to Spain and most of the rest of Latin America were colonized by the Spanish whose colonial influences have a direct influence in the way they conduct themselves politically (Most latin american strongmen and dictators are just modern-day Caudillos from the colonial era). I'm not even gonna get into their racial caste system that is the root of their racial issues
But I digress.....my main point in my "incoherent argument" is that you can compare Brazil to the other former colonies of Portugal and Spain and get a quicker answer to whatever you're trying to figure out than attempting to compare it to the U.S.