The reality is that Trump said he’d return the 14th Amendment to its Original Intent for the good of the country. It’s one of the reasons he’s the nominee.
So let’s follow your logic. Curiel was born on the US to two Mexican nationals. So he’s a NBC of the US, correct?
Cruz was born in Canada, to a Cuban and a supposed US citizen [no one knows for certain if she acquired British citizenship during her time in England, but there are definite indications that she did]. According to Canadian law, Cruz is a NBC citizen of Canada.
So far so good?
Good for him. I'm for it. But, as you yourself admit, that is not a Reality today.
And, by any legal measure, Curiel is an American citizen. And so is Cruz. That's Reality, as well. Whether you (or I) like it or not.