I don't see any connection between incest and pedophilia. I am an exclusive ped, so I have no biological children and it is unlikely that I ever will. But I do have nieces, and I have zero sexual or romantic interest in them. If I ever became a father, I would not have any sexual/romantic interest in my own children either.

It's possible for someone to have both pedophiliac and incestuous tendencies, but that does not mean the two are related.

These strange tribal stories don't offer any insight into the thinking of pedos, in my opinion. In a society with only 100 people, incest is necessary for survival, and with so few elders setting the rules, it is inevitable that strange behaviors will become dominant.