Powder;
I can tell you honestly that I'm not racist. I'm an NRA Certified Rifle, Pistol, and Shotgun instructor, and run NRA High Power and Smallbore matches. I welcome anyone to my events; regardless of race, religion, sexual preference, or even (gasp!) their political convictions.
Are there racists who are also NRA members? I'm sure that no one could answer that question anything but "yes". When you have 4+ million members, you have a sufficiently large cross-section of the population that ANY similar statement is going to be an unequivocal "yes." Are there gays? "yes." Are there people who hate gays? "yes." Are there pro-drug legalization people? "Yes." Are there ANTI drug legalization people? "Yes."
I mean, stop and think about it. In any cross section of the population that large, you are also going to (statistically) get murderers. Rapists. Child molesters. Drug offenders. Career criminals. Priests. Fast food workers. Government officials. Policemen. Lawyers. Doctors. Animal Fertility Specialists. Heck, you're also likely to get extremely niche professions such as astronauts, and nuclear physicists.
I find the concept of the organization, as it exists today, being "racist", as quite ludicrous, considering the sheer number of members.