No it doesn't. Because there are other studies that back up the causal relationship. He's taken one that shows a clear correlation and explained why that's not enough to craft policy from, and that's true. But studies that show cross time correlation between homicide and gun ownership also exist.

It might not be the only cause, but it being a cause makes sense: another poster showed a news story of a man who had killed 3 black kids who were trying to break into his house. Had he not had a gun, it's unlikely anyone would have died (most home intrusions, even with armed assailants, don't end up killing anyone). Guns provide means for homicide that basically no other tool provides.