Like the; "NRA Buys the Congress", "Gun violence is epidemic", "Nobody defends themselves with a gun", "The CDC can't do gun related research", "AR15's are weapons of war" et. al.
It's all simplistic mental and moral rationalization for them.
Otherwise they'd have to realize and accept that their view is not only out of the mainstream ... but also shrinking quickly.
After all, they are intellectually, morally and ethically superior to everyone else 
, just ask them. Just read any thread in the other group for a gauge on the level of "Smug" they generate.
So they just keep believing in all their bumper stickers and ranting a little more irrationally as time goes by.
Not even realizing that more people are slowly shifting away from them, like a loud, annoying drunk at the party.
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