Well, I'm glad you understand the law and the Founders' intent better than Chief Justice John Marshall, Justice Joseph Story, Chancellor James Kent, and James Bayard, all of whom were among the most prominent experts in US law and pretty much contemporary with the Founders and Framers - with some of whom they undoubtedly discussed such Constitutional issues.
The law at the time of Cruz’s birth declared him in law a “citizen”.
As did the law at the time that Bayard, Marshall, Story and Kent said that such persons were natural born citizens.
What law does Bayard rely upon for his claim?