I fully recognize that systems of crime reporting are dramatically different, which I did (at least attempt to) clarify going into it early. I understand that it is a complicated mess, and there is no apples to apples comparison.
Regarding your other statement:
This is a canard - where have all the second amendment activists been for this century so far? They don't seem to be doing a very good job of it, and don't seem particularly interested in protecting any amendment other than the second.
I have to confess that I take a certain amount of offense to that, though I'm not exactly sure what you're implying (I'm just vaguely offended at this point. ;-).
Are you trying to assert that people who care about the second amendment only care about the second amendment? Or are you trying to assert that people who care about the second amendment have been complacent for the past decade? Both? Some combination thereof?
At least personally, I've been politically active in a number of civil rights issues including those on the first and fourth amendments. I've testified before state Senate and my House of Representatives on civil liberties and the potential incursion of those liberties for some time now. (Thereby disproving that all gun nuts only care about the second amendment.)
As for the second, at least in Maryland, we've been fighting our 'May Issue' statutes here in Maryland, and I was personally a part of the case that got our state laws overturned (at least temporarily) to 'Shall Issue' status (though it's currently back in legal flux, but that should disprove that all second amendment advocates have been complacent).
Knowing that your statements weren't a Boolean, I'll wait for clarification as to what you actually meant, but I think that it's perhaps only as visible lately because the second amendment is in such peril. In the past decade though, there have been nearly a dozen high profile cases in defense of the second amendment in DC, Illinois, Chicago and Maryland at the least.
Also, oddly enough, the American Civil Liberties Union doesn't recognize that the right to bear arms is an individual right (and they believe that the ruling in DC v Heller, which specifically states that it is an individual right is wrong), so second amendment advocates tend to clump together into one of two groups, where you either are or aren't in support of the ACLU.