The biggest murderers according to this site:
Joseph Stalin Soviet Union 1929-1953 42,672,000
Mao Tse-tung China 1923-1976 37,828,000
Adolf Hitler Germany 1933-1945 20,946,000
Chiang Kai-shek China 1921-1948 10,214,000
Vladimir Lenin Soviet Union 1917-1924 4,017,000
Tojo Hideki Japan 1941-1945 3,990,000
Pol Pot Cambodia 1968-1987 2,397,000
Yahya Khan Pakistan 1971 1,500,000
Josip Tito Yugoslavia 1941-1987 1,172,000

Worth mentioning here is that the numbers of Stalin and especially Mao Tsetung are most likely greatly bigger than those given here. Also it is interesting that Pol Pot in a period of less than 5 years managed to murder 1/3 of his people (Cambodia had 6 million inhabitants).

I also wonder:
What is it that makes the US government of higher standard than the governments in Western Europe?

And would like to say that:
Nationalism is also something I think that we all should refrain from after we saw what happened in the 1900s.

"Nobody ever mentions the weather, can make or break your day.
Nobody ever seems to remember life is a game we play"
"Hello hello it's good to be back, it's good to be back"