I think it depends entirely on the narrative structure in which the fictional violence is portrayed. I'm talking about when it is glamorized, done by the hero,

I think it depends entirely on the narrative structure in which the fictional violence is portrayed. I'm talking about when it is glamorized, done by the hero, frivolously, randomly, without consequence, gratuitously, used as a depiction of power, etc. People who feel lacking in power in life might resort to violence as a means of feeling a sense of significance, if they have no other viable means of purpose.