I don’t think it’s the impact of porn so much as the impact of being raised in a deeply messed up family. When your dad thinks the best way to deal with his brother’s booze and drug problems is to shoot him you’re probably not going to be the most well adjusted person in the neighborhood.
Do you contend that the dad's believing that the best way to deal with his own brother was to shoot him had absolutely nothing to do with the dehumanizing influence of pornography? Pornography has been shown to be a gateway into any number of deviant and violent behavioral problems. When another human being is reduced to being a piece of disposable meat or an object, the value of their life has been diminished to almost nothing.