I can easily believe the Bible figures: For more perspective:
The worst genocides of the 20th Century
Mao Ze-Dong (China, 1958-61 and 1966-69, Tibet 1949-50)
49-78,000,000
Jozef Stalin (USSR, 1932-39)
23,000,000 (the purges plus Ukraine's famine)
Adolf Hitler (Germany, 1939-1945)
12,000,000 (concentration camps and civilians WWII)
Leopold II of Belgium (Congo, 1886-1908)
8,000,000
Hideki Tojo (Japan, 1941-44)
5,000,000 (civilians in WWII)
Ismail Enver (Turkey, 1915-20)
1,200,000 Armenians (1915) + 350,000 Greek Pontians and 480,000 Anatolian Greeks (1916-22) + 500,000 Assyrians (1915-20)
Pol Pot (Cambodia, 1975-79)
1,700,000
Kim Il Sung (North Korea, 1948-94)
1.6 million (purges and concentration camps)
Menghistu (Ethiopia, 1975-78)
1,500,000
Yakubu Gowon (Biafra, 1967-1970)
1,000,000
Leonid Brezhnev (Afghanistan, 1979-1982)
900,000
Jean Kambanda (Rwanda, 1994)
800,000
Saddam Hussein (Iran 1980-1990 and Kurdistan 1987-88)
600,000
Tito (Yugoslavia, 1945-1987)
570,000
Sukarno (Communists 1965-66)
500,000
Fumimaro Konoe (Japan, 1937-39)
500,000? (Chinese civilians)
Jonas Savimbi (Angola, 1975-2002)
400,000
Mullah Omar - Taliban (Afghanistan, 1986-2001)
400,000
Idi Amin (Uganda, 1969-1979)
300,000
Yahya Khan (Pakistan, 1970-71)
300,000 (Bangladesh)
Benito Mussolini (Ethiopia, 1936; Libya, 1934-45; Yugoslavia, WWII)
300,000
Mobutu Sese Seko (Zaire, 1965-97)
?
Charles Taylor (Liberia, 1989-1996)
220,000
Foday Sankoh (Sierra Leone, 1991-2000)
200,000
Suharto (Aceh, East Timor, New Guinea, 1975-98)
200,000
Ho Chi Min (Vietnam, 1953-56)
200,000
Michel Micombero (Burundi, 1972)
150,000
Slobodan Milosevic (Yugoslavia, 1992-99)
100,000
Hassan Turabi (Sudan, 1989-1999)
100,000
Jean-Bedel Bokassa (Centrafrica, 1966-79)
?
Richard Nixon (Vietnam, 1969-1974)
70,000 (Vietnamese and Cambodian civilians)
Efrain Rios Montt (Guatemala, 1982-83)
70,000
Papa Doc Duvalier (Haiti, 1957-71)
60,000
Rafael Trujillo (Dominican Republic, 1930-61)
50,000
Hissene Habre (Chad, 1982-1990)
40,000
Chiang Kai-shek (Taiwan, 1947)
30,000 (popular uprising)
Vladimir Ilich Lenin (USSR, 1917-20)
30,000 (dissidents executed)
Francisco Franco (Spain)
30,000 (dissidents executed after the civil war)
Fidel Castro (Cuba, 1959-1999)
30,000
Lyndon Johnson (Vietnam, 1963-1968)
30,000
Hafez Al-Assad (Syria, 1980-2000)
25,000
Khomeini (Iran, 1979-89)
20,000
Robert Mugabe (Zimbabwe, 1982-87, Ndebele minority)
20,000
Rafael Videla (Argentina, 1976-83)
13,000
Guy Mollet (France, 1956-1957)
10,000 (war in Algeria)
Harold McMillans (Britain, 1952-56, Kenya's Mau-Mau rebellion)
10,000
Paul Koroma (Sierra Leone, 1997)
6,000
Osama Bin Laden (worldwide, 1993-2001)
3,500
Augusto Pinochet (Chile, 1973)
3,000
Al Zarqawi (Iraq, 2004-06)
2,000
http://www.scaruffi.com/politics/dictat.html