Statistics and data used to say the world was flat.
What data and statistics were used to for this?
Data can be manipulated to say almost anything.
As indicated by your first statement?
The data in the article may be 100% correct, but some key information is missing and giving people the wrong impression.
"Assault mortality" which is the basis of 1/3 of the the study (2 of 6 tables) is not defined in the study. We tend to think of "assault" as being a bad thing, like "homicide" but like "homicide," "assault mortaility" seems to be about those who died from the violence of others, for reasons good and bad. Healy did not go into this either in his data presentation that was used for this study.
So sure, we have violence and we are apt to have more gun deaths in the south than in some other areas and the south tends to have less gun control. Strangely, the key statistic not addressed is how many of those gun deaths justified self defense shootings. You will find a higher percentage of gun deaths that are justified in places with less gun control (I would bet) than with places with more that have less people legally owning guns and hence less legally defending themselves with legally owned guns. Look at countries like GB where justified used of guns in SD is dramatically down with legal gun ownership and as such the percentage of illegal gun deaths is higher relative to legal gun deaths (self defense uses).
No doubt Samuel Williams shooting of two robbers will go down at 2 incidents of gun violence because two people were injured by a firearm, though they were two bad guys with lethal weapons of their own and threatening to kill people and so the 2 incidents of actual gun violence here were perfectly justified by law as self defense. This seems to be rather ironic.
Violence is not always bad. It may not be an ideal, but sometimes is necessary.