Your concerns are well taken, and I do share your sentiments.
However, I must respectfully disagree with your premise: that violent crime has gotten worse over time.
By just about all measures that I have looked at (economists and criminologists, mostly), the rates of violent crime, (assault, agg. assault, including murder), have been dropping at a steady and a consistent pattern since at least the 1970's. The rates of violent crime have been dropping so dramatically that criminologists are searching for an explanation as to why.
I cite these stats all the time (can be found at the Crime Research Prevention Center): The US is a very safe place. Half of all the US counties average zero murders any given year. 25 percent of the counties have only 1 murder a year. And 70 percent of all the murders occur in just 3 percent of the counties.
The psychologist Steven Pinker wrote a book called 'The Better Angels of a Nature'. In it, he catelouges the history of human violence. He concludes that human beings are steadily becoming less violent.
Just think of the mass brutality in the history books. The first 100,000 years of human beings consisted mostly of brutality, tribalism, and murder. When a tribe met a different tribe at their water hole, it always ended with mass genocide. The average lifespan was about 25, and up to half of all deaths were violent deaths.
Now look at antiquity. Civilizations formed, but still the brutality was unimaginable. Think of how blood thirsty the Romans were, with their slavery, murder, and gladitorial combat.
Going into Medieval history, the bloodshed never stops. Read about leaders like Vlad the Impaler, and the mass atrocities that were the norm. Believe it or not, in terms of everyday violence, the 'norm' for most humans that walked the earth was closer to living under ISIS than it is to living in our society today.
Now, we live in a society where murder is rare (~4 per 100,000 in the US). Violence happens, but no where near the scale that humanity is used to. Theres even evidence that non-human primates are becoming less violent.
I understand your sentiments---but I think a big picture look is worth taking too.
