You're still not getting it.
No, you are the one who doesn't get it.
If this is a setup, which it appears it might well be, the prosecution will be unable to place the gun that was in Mecklers possession at the check-in counter anywhere else in the state of new york. Not likely Meckler would divulge anything to that effect, especially if he's been over this in advance with staff at the Second Amendment Foundation.
So all new york and the queens d.a. have is a sharp lawyer and conservative political activist with friends in high and low places arrested in violation of his 2nd Amendment rights and charged with possession of a handgun in a safe harbor for such activity under federal law.
Now maybe you're beginning to get it.
And, perhaps, new york and the d.a. are starting to realize they may have been duped.