Ah, I see you made it to this thread after all. I just sent you this link in an FRmail.
The only thing I will contribute to this thread is this:
A child born of two US Citizen parents on American soil is a NBC. No doubt.
Any deviation from the above presents problems, if there are problems there must be doubts, ergo the discussion on this thread.
JMHO
That’s been my position for a long time. There is only one path to citizenship about which there can be no doubts. One can make arguments for and against the eligiblity of all other paths. JMHO2