Zumbo is just a case in point
His troubles started when he made a rash decision about the utility and appropriateness of using the AR15 platform for hunting. His words, in effect, stated that the AR15 was no good for hunting, and that no one needed it for this purpose.
This is the same logic that the anti's use when they say that shotguns are okay for duck hunting, but no one needs an AR15, S&W Model 29, etc., since those aren't traditional "hunting" arms.
Morons like Zumbo forget that it's all about all firearms, and not just Model 700's, and 870's.
He's attempted to redeem himself by going out with Ted Nugent, and then stating that he had been redeemed.
Words mean things. I don't have a need for a Barrett in .50 BMG. However, it's just another firearm, and I believe that people who want them, should be able to own them. Zumbo knew exactly about what he wrote, and meant every word of it. He's just another effete writer that was/is never a true believer in the Second Amendment.
It's not as much the object, as it is the right that's endangered.