It’s often learned behavior since childhood. Children of people with low social and emotional awareness turn out the same as their parents. Not always, but often. He likely grew up in a family that operated in that manner. Could be of course personality disorder. There are many out there and several overlap.

Just have to say that being very involved with your kids and being scout leaders doesn’t mean they had high EQ or were spectacular parents and so on.

The only way to diagnose him is for him to see a specialist. There are too many different factors that would make our assessment inaccurate.