The fact is that the NRA is fueled mostly by the ammo and weapons industry. It is not now, nor has it ever been a civil rights group.
I imagine that the weapons and ammo makers and their retailers do not actually care who buys their stuff, so long as they do not wear their NRA logo hats, shirts and jackets to massacre sites, which would be offputting.
I read that since the Gaby Gifford massacre there have been SIXTY multiple murders of that sort.
Of course, sirs will tell us that there would have been many, many more prevented by well-armed gun enthusiasts. And of course, that would be typical bullpoop.