I don’t know if he is eligible or not, but if he is then would it be true that a Iranian Muslim could take an American wife. Take her to Iran, Syria wherever and have a child there. Let’s say they move to America when the child is 15. If Cruz is eligible to be president so would this fictional person.
Your scenario is precisely why the founders insisted on natural born citizen.
Born here of citizen parents.
No other possible citizenship or loyalty.