[traditionalist]

The fact is relevent because if you were not aware of it, it could induce as spurious relationship between crime and concealed carry laws. States without concealed carry (CC) more likely to have a log drug-related crime. Hence if you examined the relationship between CC and crime without controling for crack addiction, you would that CC tends reduce crime even though it may not. This is called correlated omitted variable bias.

[SauronOfMordor]

Hence if you examined the relationship between CC and crime without controling for crack addiction, you would that CC tends reduce crime even though it may not. This is called correlated omitted variable bias.

The relevant stat is not the level of crime in CCW states, but the level of crime COMMITTED BY CCW HOLDERS (which is generally insignificant). The only justification for restricting CCW is if CCW holders were likely to commit crimes with their guns. Since the gun-grabbers are unable to show anything like this, they have to work with other statistics

[DugwayDuke]

I'm not quite sure of the point you're trying to make. Donahue is arguing that adopting CCW laws in high crime, drug infested urban areas would increase crimes such as crack shootouts. This is irrelevent since criminals, particularly crack dealers, would be highly unlikely to apply for, or be granted, CCW permits. In effect, he's arguing that liberalizing carry laws in high crime areas would result in more crimes since more criminals would then carry concealed weapons.