Read the list. This bit of NRA propaganda is mostly falsehoods, as you might expect.
A quick search of NRA killers turns up two...
Adam Lanza, the man behind the massacre at an elementary school in Newtown, Conn., possessed a National Rifle Association certificate in his name, new reports say.
Reuters reported that according to documents released on Thursday, police discovered NRA certificates in the name of Lanza and his mother, Nancy Lanza — whom he killed before starting the shooting at Sandy Hook Elementary School. The two reportedly frequented gun ranges together as Adam Lanza was growing up. https://www.politico.com/story/2013/03/adam-lanza-mom-nra-certificates-089426
One of the recently convicted concealed carry killers was National Rifle Association lifetime member William Sherwood, who shot and killed a fellow motorist following a traffic accident in Melbourne, Florida. Sherwood was found guilty of second degree murder on September 17, 2014. He faces a minimum of 25 years in prison and could receive up to a life sentence. http://www.vpc.org/press/vpc-identi...rry-killers-including-an-nra-lifetime-member/
Feel free to show me which of the instances is faked in that article. Hint: Unlike your faked list, Snopes publishes the data that you can check for yourself.