I think in some instances, it’s an argument that isn’t without complete merit. The normalisation of killing people en masse, even in the setting of a video game, must have a tendency to effect the disposition of some people with pre-existing mental health issues towards going on a killing spree. Perfectly stands to reason. The fact those two cunts have dishonestly deployed it as the principal cause, when the US’s gun laws and culture manifestly are, doesn’t mean that isn’t a contributory factor in some instances, as much as drink and drugs might be in certain cases.
I fail to see how it can be dismissed out of hand, when fantasy and reality are so closely related. Some people live out their fantasies. Sometimes with little or no regard for the consequences to others, or the cost to human life.
That doesn’t mean I think they should be banned btw. The overall impact is negligible, especially in this country, but to suggest it plays absolutely no role I believe would be wrong.