The article's assertion is false. According to the Strategy Page web site, the 2006 Iraqi death toll was 11 times the U.S. murder rate and two-thirds of the American death toll (per capita) in the worst year of World War II, 1944. Go to:
http://www.strategypage.com/qnd/iraq/articles/20070103.aspx
He is comparing the Iraq to large cities, not the US as a whole. So his point stands.
Do you mind? We're trying to skew statistics, here. It's a nice way to unwind after a long day of pointing out how the MSM plays with numbers for propaganda value. ;-)