Do Video Nasties cause High School shootings?

This is taken from the book ‘Media And Violence’ by Karen Boyle. It talks about how the killers of a high school killing prior to Columbine where fans of Video Nasties. However I feel that it wasn’t the video nasties that did it. The media also say that they where fans of video game and other violent mediums. But it’s still a good section.

“I want to turn to a report in The Sun a few months prior to the Columbine massacre. Sensationally Headlined ‘BOYS KILL FIVE THEN EAT PIZZA’ (2 December, 1998), the report described how two teenage boys, ‘massacred five people for kicks after watching video nasties’. Whilst the article goes on to suggest a causal link between ‘video nasties’ and murder, no one would seriously suggest that there is a casual link between murder and pizza eating. Rather, the juxtaposition of murder and pizza eating is supposed to tell us something on the killers (their lack of remorse, callousness and so on). Yet, on the basis of the evidence offered, the ‘murder causes pizza eating’ hypothesis is as plausible as the ‘viewing video nasties cause murder’ hypothesis. All we are told is that one event followed the other, just like killing followed bowling in the Columbine case. However, we are so used to video nasties being linked to murder that this lack of evidence is not glaringly obvious.”
The Effects of Violence in the Media Page 5-6