Have you ever watched a movie? How about a movie that had actions in it that you would personally never commit? Why? What is the benefit? Action movies are popular, so are action games. Technology has risen to the point where such big budget games are very cinematic in their scope and execution. I liked Schwarzenegger movies, now I like "Call of Duty." Your broad brush says that I have mental problems. Well, all of my actions movies, violent video games, and a 15-month combat tour in Iraq have yet to reduce me to a violent psychopath, so I'd say your statement is absurd.
I don’t watch violent movies or TV shows. And be sure to watch for symptoms of PTSD.
I wish you well and thanks for your service.