Nevertheless, this thread is about Cruz.
You made your demand in response to his suggestion that Obama's mother may not have passed on citizenship. It wasn't clear to me that you had imposed this prerequisite.
Many questions remain about the authenticity of Obama's birth certificate, even if you don't share them. Evidence of forgery has been submitted, but as far as I know there has been no adjudication of the issue.
Nevertheless, this thread is about Cruz.
It is. But, I don't think it is unreasonable to ask whether the goalposts are being moved because the political football is being kicked by Cruz instead of Obama.
Yes, I realize you in particular aren't moving the goalposts. But, if you were to search for the topic "NaturalBornCitizen", you would find that Obama's eligibility is still being discussed on FR by a number of people.