I'm also sure that lots of European types have moved to Brazil, but that has nothing to do with the indigenous people in Brazil, which bear the same characteristics as the rest of South America.
My original position was that Mexico was settled in the dim past by South Americans.
There was no "South" America in the dim past.
North, Central, and South America are post-Columbian divisions.
Yes, of course, but they are less than 1% of the Brazilian population, and they mostly live in the Amazon jungle, not Texas.
99.999999999% of the Brazilians who come to the US are either white, black, or a black/white mixture. They do not look like the average Mexican; the only confusion may occur among whites, irrespective of whether they are from Mexico, Germany or Brazil.
Brazillian are mistaken for Mexicans by ordinary people all the time.
Still false.
As far as is known, it was really the other way round. The first and second groups of "indiginous" Americans migrated from north to south, both having come from Asia. Mexico is part of what is now called North America. The Distinction between North, South and Central America is somewhat artificial, just like that between Asia, African and Europe. There's really only 4 continents, and that's if you count Antartica and Australia. In the far far past, IIRC, there was only one.