Permanently domiciled, yes. Green Card holders are permanent residents too ( AKA permanently domiciled ). But were Wongs parents CITIZENS?
If not, then in what sense were they ( based on your understanding of subject to jurisdiction ), subject to American jurisdiction?
No, they were not citizens.
As I've previously explained, birthright citizenship wasn't extended to the children of some aliens until the U.S. v. Wong Kim Ark decision. And even then it was only extended to those whose parents had an established permanent domicile in the U.S. at the time of the child's birth. As such, WKA did not have to meet the 14th Amendment's "subject to the jurisdiction" requirement as it was specifically his case that extended birthright citizenship to U.S. born children of parents permanently domiciled in the U.S. Wong Kim Ark's parents were permanently domiciled in the U.S. at the time of his birth. That fact was agreed upon by all parties in the case.
OK, let me get this...
It is your understanding that the 14th Amendment grants Birthright Citizenship only to the following:
1) Babies whose Parents or Parent are Citizens
2) Babies whose Parents or one Parent are LEGAL RESIDENTS of the USA.
It does NOT grant Birthright Citizenship to Babies who parents are NOT legal residents regardless of whether they are here legally or illegally.