Also before modern medicine and other stuff the climate outside of mountainous areas (which besides some exceptions weren't necessarily able to sustain high population density) wasn't great. e.g New England was a much nicer place to live and therefore natural population growth was relatively low.

Combine those things with there being way less Native Americans in the North (due to various reasons) to begin with, very different colonial policies and treatment of the native people and the result is not that surprising.

The British/Americans were settling the territory of primitive tribal nations. Taking over the land was the goal of the entire enterprise. The people were an afterthought.

Segregation and White Power/Black Power/Native Power should be dealt as something totally obsolete, kinda backwards. "Mi tribe it's the best one, and the rest of the worlds sucks".

As a Spaniard I always hated the concept of reservations and idiots like Jim Crow. The point of America should have been to leave out your tribe behind to be something else.

Iberians bred with the people they conquered. The Spanish in particular practiced an intentional policy of breeding a caste of illegitimate mixed-race offspring that would mediate between the Spaniards proper and the aboriginals they had enslaved.

In the Spanish colonies, there emerged a project to “Mejorar La Raza” (literally: to better the race) by encouraging breeding with those of a fairer complexion than oneself. I suspect (though have never confirmed) that this attitude was primarily fostered to encourage women to more readily breed with Iberian men, but in the present day the attitude is quite prevalent among both Latino men and Latina women; Latinos fetishize white features, which are associated with being not only high-status and wealthy, but also simply beautiful in their own right.

The Americans largely arrived after small pox had substantially reduced the native population, and subsequently followed a comparatively genocidal path of historical development. They did not tend to breed with the natives they encountered, so they have a far lower proportion of aboriginal ancestry. At some point between the late 1800s and early 1900s, they developed a romantic appreciation for Native Americans, which later leads to the common trope of every American family claiming to have a Cherokee great great grandmother on their mother’s side. Since the 2000s, the common trope is that all the growth in these tribes has been from white-passing people looking to cash in on affirmative action; this is not an undeserved stereotype.

This is somewhat unsure. First, if we are talking about the Spanish conquest, that is deep 16th century, with all its magical thinking. God, the Devil and witches were all plausible explanations for epidemics, and holy processions, pilgrimages and carrying of medailons dedicated to saint X were considered reasonable treatment methods. It is a mistake to look at the 16th century with 21st century eyes; it is a different world resting on very different mental foundations.

Second, at least in the Spanish territories, losing your workforce was economically disadvantageous.

Doing this is the equivalent of throwing a small piece of litter in an otherwise clean alley. Humans being what they are, the alley will soon be a trash heap.

Yeah, and as you see, the 100 million is a highly questionable value. Just try to read past the first paragraph, maybe?

> but even that was spread with intent once found out their immunity is weak against old continent diseases

Nope. The germ theory of disease was not formed until 1800-s, the invention of vaccination was in 1796. There were some inklings that smallpox can be spread through contaminated items even before that time, but not much earlier.