If her parents decided to leave the United States, the United States had no jurisdiction to stop them from taking her with them, again, because they were not subject to the jurisdiction of the United States until they became citizens years later.
The entire family were subject to the laws of the United States as long as they were on US soil, regardless of any foreign laws.
So you think foreigners in the US are not subject to the jurisdiction of the US.
That’s about as leftist thinking as I have ever heard.