"We are the Impartial Police Force,
The Guardians of Sydney are we...."
The culture of mindless violence...in the UK, the US, Canada, Australia, Germany.... Lament it how you will.
If we continue to teach, via movies and television and the actions of our leaders that violence is an appropriate solution to problems we will perpetuate it.
Violence will always be with us. Anything can be used as a weapon if someone wants to do so (PM me and I'll send a list). And sometimes (though rarely) violence is the only appropriate answer, such as self-defense. We have failed to teach that by our example.
We'll never stop the rot until we get serious about doing so. And we're not serious.