I agree. The study is garbage.
"One-third of Americans reported owning a gun, ranging from 5.2% in Delaware to 61.7% in Alaska. Gun ownership was 2.25-times greater among those reporting social gun culture (PR=2.25, 95% CI 2.02 to 2.52) than those who did not. In conclusion, we found strong association between social gun culture and gun ownership."
Anything based on self-reported gun ownership is suspect. People have lots of motives not to be honest with pollsters on a subject as sensitive as this, or simply not to participate in the survey. Furthermore, "social gun culture" is highly subjective.
I would suspect that the high reported rate of gun ownership in Alaska, for example, is partly due to the fact that there is little to no social stigma against gun ownership in Alaska. Conversely, there is lots of social stigma against guns in some of our more urbanized states. People that own guns there would tend to keep them a secret.
What we would need is objective data, such as the number of NICS checks. An additional data point, in the case of Virginia, is the number of machine guns registered with the State Police under the Uniform Machine Gun Act. If that is any indication, gun ownership in Virginia is quite high.
I think you misunderstand northern Virginia. Yes, as a suburban area, there are plenty of soccer-mom type antigunners. Yet there are lots of gun owners here as well. (For proof, all you need to do is look at the mob scene at the monthly Nation's Gun Show in Chantilly.) Remember that the region's main employer is the federal government. When people come to the area to work for the government, they have a choice whether to live in D.C., Maryland, or Virginia. Anyone who's remotely interested in guns will locate to Virginia. So there's a bias there, and it's been that way for many years. And, BTW, a lot of the federal employees are military or law enforcement. They are not by nature antigun.