These things always strike me as a bit dodgy, personally I think that a persons cultural associations are far more relevant than their ancestry. The genetic variations that cause the differences of skin colour and physical features these sort of classifications rely on are so minute as to be negligible.
I am confused by this "Latino" thing though. Does it refer to South Americans of Spanish or Portuguese heritage, in which case they would be European, thus "white". Or does it refer to the product of a South American "melting pot" in which case reference to South American native Americans (and indeed black South Americans) would seem redundant. Just an observation from a confused outsider.
By the way it would be seen as extremely offensive to refer to an Aboriginal Australian as a "Pacific Islander" (who if we are to be technical belong to two distinct ethnic/cultural groups anyway).
Latino can refer to either a person from Spanish speaking Latin America or someone from Brazil and also includes the Latin American diaspora throughout the world. Conversely "Hispanic" is a term that refers only to Ibero-American people from Spanish speaking Latin America or the diaspora from these countries located in other parts of the world.
Brazilians on the other hand are also an Ibero-American people but whose father culture and language derives mostly from the other nation/culture of the Iberian penninsula , Portugal. As such, they are Latinos but not Hispanics.
Racially/ demographically things are ambiguous at best and trying to reach any generalization is almost impossible and extremely likely to induce a headache. Some countries of Hispanic Latin America such as Mexico , Peru , Bolivia, Colombia etc. have populations that are predominately mestizo meaning the mixed race descendants of white Iberian colonists and indigenous peoples with further admixture of African peoples brought to the Americas through the Trans-Atlantic slave trade. In Brazil it is vice versa with the predominate population being a racial mix of the descendents of largely white Iberian colonists and African peoples who were brought over as slaves, with indigenous descent being to a much lesser or diluted extent.
But then to add to this complexity there has been widespread immigration waves in the 19th /20th and 21st centuries from diverse countries and regions to Latin America such as : France, Scandinavia , England , Ireland , Italy, Greece , Russia , China , India , Belgium , Germany , Japan etc.
To give an example: Brazil has the largest population of the ethnically Japanese diaspora outside of Japan , the largest population of ethnically Lebanese people outside of Lebanon , the second largest population of ethnic Germans outside of Germany , the fourth largest population of ethnic Italians outside of Italy and the fifth largest population of Spaniards outside of Spain.
Are these people latinos ?
In a sense yes, because although they may not be of Ibero American stock nor strictly identify with the culture they are still born and raised to varying extents within the cultural region and within Brazilian culture.