Again, "citizenship at birth" is NOT the same as "natural born citizenship." The Court ruling in Rogers v Bellei demonstrates this conclusively. A "natural born citizen" can't lose his citizenship as a result of failing to comply with a law.
You’re citing a decision that has been moot for 35 years.
“The statute under which Bellei was stripped of his citizenship was repealed by the U.S. Congress in 1978.”
That’s like citing Dred Scott to support the theory that Obama can’t be president because he’s of African origin.