Not surprising. I’ve always thought there is a correlation between intelligence, education and atheism. Perhaps atheists tend to be too moral and too intelligent to become criminals. Or perhaps often/usually too intelligent to get caught.
The figures may also be skewed in the US because a plethora of poor black males are in prison for non violent drug related crimes.
My understanding is that here in Oz, the average career criminal isn’t very bright. EG risks years in prison for say robbing a liquor store or burglary. Even if very successful, the gains are usually measured in the odd thousand or two at best. Such people may also have trouble fully understanding the consequences of their actions, like adolescents.