It isn't about american culture and violence and disney movies - all american culture and movies are now available worldwide. I live in the US and no one I know is infatuated with violence.
Japanese anime and culture is available world wide, and Americans eat that shit right up. We are not on our way of adopting an Asian culture. Assuming because you do a few American things and watch a few movies, it would influence your country's entire culture is just silly. We love Dr. Who and Sherlock over here too, I don't see people acting British.
Everything you just said about gun lobbying, silencing doctors, etc.. IS part of our culture's infatuation with violence. Our movies are a reflection of our culture, not the cause of it. You may not know people that sit there going "Oh man! I hope someone dies in this movie". That is not what I'm talking about. Our culture as a whole loves violence. If this were not the case, Americans would be outraged by the NRA, but we're not.
Our country was founded on a war that we won.
Look at American football or even Hockey. Now look at your sports and how gentle they are in comparison.
The number one form of suicide is shooting yourself in the head. We have pharmaceuticals and pills in easy access to over dose in your sleep. Yet, people choose the most grotesque way to do it.
We have more police brutality, our riots are more destructive, we're the first to jump into war and send out our troops. We have a death penalty still and people refuse to vote it away. American culture is so saturated with violence, it's normalized.
It goes way beyond NRA being corrupt and greedy.
As a side note, Americans are all very much aware of children accidentally shooting themselves. It's constantly in the news. If you can't figure out that having guns that aren't safe with small children, you're an idiot. The problem is the "it can't happen to me" attitude.