The increase in cinematic gun violence accounts for the increase in real life gun violence. When people see others using guns and other lethal weapons on the silver screen, they think that it is okay for them to use guns in real life. This accounts for the dramatic increase in gun violence.
Yes, as gun violence in movies has increased, real-life violence has also increased. Are the two related? Absolutely! Gun violence in films is often glamorized, and the lines between the good guys and the bad guys have become blurred in recent years. Additionally, research has shown that people, especially children, who are exposed to violence become desensitized to it. Even though films are given ratings, that only stops children from viewing them at theaters without an adult. Once those same films hit cable or even regular TV, children of all ages have access to them unless their parents are very careful. Since TV follows the movies' lead, the increase in movie violence has also led to an increase in television violence. We now have a culture that implies that gun violence is a normal part of life. This has led to increased violence in our real lives.