In 2007 there were approx. 1500 murders in Jamaica, an island with a population of ~2.7 million people.
And by far most of killings came from the many slums on the island, places that clearly you don't want to be. So yes, there are scary places outside the U.S. and it's ridiculous/ignorant to think all the worst are in America.
Related Story:
http://www.guardian.co.uk/world/2008...rnationalcrime