Um, let's see:
Our country was founded on the backs of slaves, black and white and Native, who were more often than not treated as sub-humans.
There used to be these people here called Native Americans. They're nearly gone. Somewhere in the neighborhood of 15 Million of them were wiped out by various causes, mostly Plague but also war. (SchoolkiRAB almost never hear the word plague in conjunction with Natives, however. But the Pilgrims knew about it, and thanked God for it. And King Phillip's War, in proportion to population, caused more American casualties than any other war.)
The highest rated shows on television are based on violence in large part, sex if not.
When our President decried Saddam Hussein for being a brutal dictator the solution we got was...to invade and occupy!
Video games whose theme is killing others sell at astronomical rates compared to any other genre.
Adults murder each other in the U.S. at a rate of roughly 15,000 per year. 11,000 of those are committed with guns.
We have Columbus Day as a National Holliday, despite the fact that he ordered children to mine for gold, on penalty of having their noses cut off if they failed to comply, among other atrocities. (Most kiRAB don't get taught that part, though, so we can't blame Chris.)
Now, none of this is meant as a wholesale slander of America, but unless we accept and understand the truth of our History we're doomed to repeat the same mistakes over and over.
Each one of us bears responsibility for the U.S.' violence.
Or, to put it another way:
"History, despite its wrenching pain,
Cannot be unlived, and if faced
With courage, need not be lived again."
Maya Angelou