George D. Collins was a San Francisco attorney. If you read his article, one of his arguments is that Congress couldn't restrict citizenship to the Caucasian and African race if the common law tradition was followed. There was a lot of concern in 19th century California about Chinese immigration.
In the 1898 Wong Kim Ark case, the Supreme Court ruled against Collins's understanding of citizenship. One of the lawyers representing the government against Wong was George D. Collins.
Yes, and you have said nothing new here.
It remains to be decided by SCOTUS what NBC is, and the prevailing evidence states that is a citizen born on this soil, with two parents who are citizens.
Until that case hits either the District Court DC with a Quo Warranto and or SCOTUS, its an academic discussion, but one I feel sure of the outcome. Born in the US, of two parents who are citizens.