Per a 1934 law. (and subsequent modifications of it.) Had Congress not passed this law, Cruz would not be a citizen at all. A "Natural born citizen" doesn't need a law to be a citizen.
If he wants to run he can. No state will deny him a place on their primary or general-election ballot, any Electoral College votes he wins will be awarded to him.
If you mean the system is broke, then I agree with you. People simply don't care about fidelity to our system of governance anymore.
Everything else is just NBC-Birther noise.
It is the truth. It only sounds like "noise" because people like you have your hands so firmly clasped over your ears.
No, I hear you fine. At some level of word-meaning purity, you may even be correct. But that's not the reality we live in. In the real presidential-election world of 2013, it is the courts who define words, make the rules, define the playing field if you will - not you or I. And the courts don't care about NBC arguments.
So stop complaining about the playing field and play to win. Penalizing our own team by needlessly excluding Cruz makes no sense at all.