alt Hacker News> excepting about 1.4% of the population - everyone here in the US is either an immigrant or descended from immigrants
Your data and percentage, is very wrong. America has significant Black and Indigenous (usually referred to as Indian or Native) populations. Around 15% Black and 3% Indigenous. Combined, they make up around 18% of the US population, with wild and vigorous arguments they are even a greater percentage than that (20% or so).
The black population of the US is unquestionably descended from immigrants.
1.4% of the U.S. population is "American Indian and Alaska Native alone". 2.9% is "alone or in combination with another race" per the 2020 census.
I have no idea what you're going on about.