I'm against the death penalty also, but this is misleading. Just look at Central America, parts of South America and parts of Africa. There are and have been many, many killings by the government in these places for the purpose of keeping its constituents under control.
Where do you get that data from? The numbers on that map are based on reports from Amnesty, so they should be pretty accurate. But if you have a better source, let us know so we can update it.