Razib Khan Aug 2023 blog post- People In Brazil Are Quite “Mixed-Race”

[RCO]

Ethnicity or "race" in Brazil depends on the individual, social class, region and family Status Quo. If you are very rich you can become more or less "Branco", a social construct.
Brazilians are extremely diverse with completely different proportions related to European, Asian, American (Native) and African origins and ancestries. We can find people of a single origin with 100% genetics from the same stock above mentioned.
The Brazilian core of the Ancient Brazilian Colonial Nobility was Portuguese, Catholic, Big Landholder, Slaveholder and member of the Government/State. Brazil became the center of the Portuguese Empire in 1808 when the Portuguese Royal Family moved to Rio de Janeiro, the new capital of the Portuguese Empire in the Napoleonic Wars.
Protestants and Jews were not considered "White" ("Brancos") in Brazil because they could not marry in the Traditional Catholic Church - "A Santa Madre A Igreja Católica" - The "Original" Roman Empire Catholic Church !
Razib Khan is considered Black in Brazil because he is quite pigmented in terms of phenotype.

A map of "white" Brazilian and American Regions.