Yes, I would agree and that has an influence on the promotion of the military mindset. But is't common to other countries too, to perhaps a lesser extent.The "culture of killing" is driven by Hollywood and video games.
I'm fine with your blaming of the left, as long as the point is starting to sink it.Both of which are controlled by the radical left.
Hollywood movies come after the fact because they reproduce the popular mindset of the people.9 out of 10 Hollywood productions glorify wanton violence. So why do you lefties keep doing that?
War and violence are both extremely popular in America.
Let's place the blame on the political left, if only for the purpose of having the 'culture' of violence accepted as a very large motivating factor for the mass murderers.