The NRA likes to diminish the role that guns play in fatal shootings by saying, "Guns don't kill people, people kill people."
Which is the same logic as, "Hammers don't build roofs, people build roofs." No duh. But it'd be nearly impossible to build a roof without a hammer.
So, shouldn't the people who manufacture guns share some responsibility when they are used for the purpose they're made: killing people? Especially when the manufacturers market the weapon for that exact purpose?