I do not need any studies. I lived through those periods. I do know the mindset of kids when I was a kid, and adults when I became an adult.
I know that until a thought is put into your head you do not think of it. However, when it is put there over and over and over again it does desensitize one to such things. If you watch **** over and over and see thing that you would never have even dreamed of, then there are those who want to try them. Until they were put into one's thoughts there was no possibility of them happening.
People do influence the thinking of others, and so it is with violence and essentially all things.
Anyway, having turned 80 last year, and lived through a fair amount of this nation's history I am capable of logically making some of those types of determinations. The argument that no credible study, blah blah cuts no ice with me. I suspect there have been credible studies that show some link between what people watch and play and their behavior, including murder.
I am going to leave it there, and each can think as he will.
Ecclesiastes 12:13 *¶Let us hear the conclusion of the whole matter: Fear God, and keep his commandments: for this is the whole duty of man.
14 *For God shall bring every work into judgment, with every secret thing, whether it be good, or whether it be evil.