Ok, one more time:
No one is arguing whether or not Cruz was a US citizen at the time of his birth - He was and is.
The argument stems from the fact that
there are two different "classes" of citizenship: "Natural Born" and "Naturalized." The only difference between members of these two classes is that one can run for POTUS and the other class cannot.
"Natural Born" = born within the confines or jurisdiction of the United States to a citizen parent.
"Naturalized" = A statute or act of Congress confers citizenship to someone other than the "Natural Born" citizen.
Cruz was not born within the confines or jurisdiction of the United States, therefore his citizenship, from the time of his birth, falls under the class of "Naturalized" because it required a legal statute to grant citizenship to children of US citizens born outside the US - as you posted above.
What you have posted above falls under "Naturalized," and therefore is ineligible to hold the office of POTUS.
The subject has been brought up by the courts before:
https://www.law.cornell.edu/supremecourt/text/169/649
Being a citizen at birth is not the same thing as being a "Natural Born" citizen.