He's already stated his position clearly and succinctly and we all got the message he sent.
He's an elitist snob hunter who believes that the 2nd Amendment is about hunting and owning traditional, wood stocked, bolt action hunting rifles and anyone that doesn't shoot with that kind of rifle, and hunt with it, should be considered a terrorist and their weapons banned in order to keep his beloved bolt action rifles and his beloved sport safe.
In other words, he's a Fudd. He's masqueraded as a friend, but now, due to tiredness, he's let the truth slip out in an unguarded moment.
I mean, what can he say? "Whoopsie, I was just kidding!". Or maybe "Nevermind!". Or how about "Excuuuuse Meee!".
Someone on another board likened him to an old Russian folk tale about riding in a horse drawn sled being followed by a pack or hungry wolves. In order to keep the wolves from getting you a baby or young child is tossed out to keep them occupied while the sled, with you on it, escapes.
Zumbo tried to toss everyone who owns a military pattern, semi auto rifle, off the sled. He's an enemy of gun owners, an enemy of the 2nd Amendment, and as far as I'm concerned there's nothing he can say to convince me otherwise.