You have seen my pics. I bet I am a good five years younger than you. Never assume that somebody holds a particular view based on their age; not all Millennials are lemmings.
In reality popular culture glorifies violence, especially through music (negro/ghetto music such as rap, as well as the various types of metal) and films. The amount of violence in recent movies (90s onward) is a lot higher than in old ones as well. The James Bond franchise is a good example - compare the Sean Connery and Roger Moore era films to more recent ones.
I was joking I know what you look like. I'm one of the last people to assume age means much of anything, beyond maybe allowing you more chance to experience, but not necessarily that you will have experience. Quality over quantity every time. Also biology.
Disclaimer this next bit is probably going to be TLDR but it's hard to break my view into a simple set of statements.
And yes popular culture is filled with violence. James bond is a good example, although even the older movie's from the 60's onwards are filled with casual violence and usually bad puns.
Although violence has always been a part of humanity, just looking at history alone. Is it that people have a notion of what it means to be civilised? And they are shocked when the reality of human nature's darker aspects comes rearing its head, contradicting their assumptions about what a so-called enlightened society should be like.
I'm not necessarily saying humans are violent by nature, although our evolution is against us, but I think mainly it is the pressure cooker of many different elements socially, economically, religiously and politically that when pushed together tend to clash. But that's also natural for opposing forces in general and often they aren't even really opposing, so much as similar drives under the guise of a different context and label. This is also not a new issue for our world, it goes on all the time; that pushing of various forces and interests until one is assimilated or destroyed and another emerges victorious or evolves.
In essence one of the most damaging notions is of tolerance. Tolerance implies something should be put up with, like a nuisance such as a fly in the house. But the reality is that we need to be able to progress beyond this attachment to I and mine, to fight against our own ignorance and ingrained habits. This goes for everywhere from my perspective, not just western countries.
It starts with a change of approach and attitude towards what we expect from the world. There are so many important issues with regards to just our continued existence for violence to be a singular issue in and of itself.
But these are just words and observations, action is more valuable I think and something I'm lacking in.