No need to stipulate that for all gun owners, just the readership of Guns & Ammo.
I was using the analogy to describe the mentality, not relating the material. To the readership of Guns & Ammo (mostly the more radical segment of gun owners), gun control makes as much sense as creationism would to a radical Darwinist. They see what they know as proven fact, and they see the opposition as a dangerous, wishful fantasy. And frankly the pro-gun argument has a much stronger logical backing than the anti-gun argument IMO, but that's another very long post to prove that point and I don't have an hour to assemble it at the moment.
Imagine if you walked into a meeting of the Brady Campaign (a hardcore gun-control lobby) and started talking about how shall-issue concealed carry has serious merit and that the Brady Campaign should look into expanding it into restrictive states like New York and Maryland. If you worked for the Brady Campaign, I can guarantee you'd be out on your ass, figuratively tarred and feathered in every way possible.
Now I know that Guns & Ammo is not a lobbyist news letter, but that's another point of mine. Gun owners at large have been turned into one giant pseudo-lobby/union. If you own any of the most popular firearms on the market today, odds are you have skin in game. Odds are you own a gun that holds more than 10 rounds, certainly. Not to mention every new gun sold comes with a "join the NRA" pamphlet in the case. If you are into guns enough to subscribe to printed magazines about them, odds are you own multiple guns of the varieties that have repeatably come under attack; and odds are you're older and have lived through several such attacks.
Ergo, it makes sense that the readership of Guns & Ammo would consist of that segment of gun owners that has long since made up its mind and has a pretty deep hatred of gun control advocacy. Even if the attempt to start a discussion was genuine, it was pathetically misguided.