n.b. I'm sure Rummel would grudgingly admit that the US is far worse than any other developed country for committing acts of "democide" this century. In fact it's probably the only metric in which a sane person could argue the US might have performed worse than North Korea in recent years.
Edit: Most of those people weren't "killed in World War II". They were murdered. By their own governments.
I fully expect the current Eurozone crisis to devolve into bloodshed before it's over, by the way.
You seem only interested in comparing the US to undeveloped and developing countries, which is not a useful comparison.
Why not compare the US to developed countries?
Bottom of the list for everything that matters.
Except for "first choice to which to immigrate", oddly.
It's called "voting with your feet".
If the U.S. had the same immigration policies as, say, Canada or Australia, you could add an order of magnitude to those numbers. Easily.
http://www.hawaii.edu/powerkills/20TH.HTM
It does?
Doesn't Europe have at least one violent ethnic conflict going on at any given time? Usually several?