It is the matter of degree to which this attitude poisons not just a single person's mind but entire collective consciousness. Some time ago I had a chance to look at the results of a study conducted by the criminologist Dane Archer at UCSC - in which he asked US and British adolescents to provide a likely outcome of a fictitious scenario involving some sort of conflict. The outcomes supplied by British adolescents featured a great deal of emotions and verbal exchanges - while those supplied by US adolescents featured mainly gory violence, usually involving weapons.
Of course, representativeness of the sample is a serious concern - but the picture of people infatuated with violence - or rather violent spectacles - seems to me like a fair picture of the US society.
Wojtek