What a horrible thing to experience! The way he yelled at her, she's probably going to accuse someone of molesting her at some point just to get that crazy asshole off her back. His extreme over-reaction and weirdness and death threat suggest that there might be something else going on. It seems unlikely, although possible, that a parent would act that crazy unless he had personal experience with molestation. Maybe he was molested, maybe a relative such as a sister, neice or nephew was molested. Maybe he's sexually fixated on children himself and therefore suspects everyone else of it. Maybe not. No matter what his problem is, something bad is likely to happen at some point.