US Code Title 8 Section 1401 subsection G does not require Sen Cruz’s father to be a US citizen. His citizenship flows from his mother.
No one is saying his is not a citizen, he is not a natural born cotizen eligible to hold the highest office in the land.
I will ask again, do any of us truly believe the founders would consider the love child of King George and an American woman natural born eligible for the presidency? Of course not.