What caused human beings to commit barbaric acts ... no matter where they are from?

-http://uk.news.yahoo.com/photos/scores-k鈥?/a>

http://www.click-manchester.com/news/nat鈥?/a>

http://www.ndtv.com/article/india/mumbai鈥?/a>No easy answers to this. It has baffled greater minds than ours, how man is able to achieve such heights of in music, art or science. And then behave as if civilization had not happened.

We haven't really advanced as far as our intellectual abilities indicate we should.

This fatal flaw in our makeup has also been described in Christian theology as being caused by original sin. Some kind of innate failing deep within us.
It originated with the fall of the Archangel Michael when he said " I will be like thee ..." Meaning I will be like God. Since then every human has inherited this urge to want to control his and others destiny when God did not intend his design to be that way.
Because people are Greedy. Hateful, lust hungry for power money and sex everywhere in the world. At the costs of other peoples lives. Because this world is filled with evil. And evil affects human beings. It always has.
When humans, of what ever race or colour, associate with the forces of evil,they step aside from human life and become the killers of the innocent.
In the Old Testament sometimes God wasn't exactly Mr. Nice Guy. He could have sent down a savior to Sodom & Gomorrah, but instead blew it to smithereens.
the bible the torah and the koran all reckon god likes it that way. me i dunno .
Man is the only animal that takes pleasure in killing his own kind.

Any difference is reason enough to kill.
Ignorance.
because evil people are from everywhere not just one place