“the U.S. can not deny a foreigner from passing their “citizenship” unto their children.”
Nor can they compel it - which is sufficient. The courts and our government have consistently ruled that someone born in the US is a US citizen by birth, with no allegiance to any other state unless they desire it.
The exceptions are the children of foreign diplomats, military, etc. And they STILL are US citizens unless they reject it by choice when old enough to do so, having obtained citizenship the natural way - by birth!
Liar, prove it.
Cite a case with that specific language.