I have read it, and have seen much of this elsewhere. It is a collection of assertions, and material that is supposed to support the point often is irrelevant. It also uses the George Mason quote you used, again with no context so as to imply Mason disdained English Common Law, when he was actually concerned that we did not have its protections. Yes, the founders consulted Vattel and Blackstone. This is is not at all persuasive that they followed Vattel on “natural born.”