Hi timothy, it's hard to believe what some humans are capable of doing to their fellow human being. But as largeli indicated this is the way of this world and nothing new for this evil age. Not to diminish what you are talking about happened, but vile despicable acts are happening in this world continually. Here is a list that points out how human life has been eradicated in some of the greatest numbers in history.
Atrocities: The Top Deadliest Manmade Events in History
1. Second World War (Worldwide 1939-45) - Germany and Japan decide that the world would be a lot better place without all those damn foreigners.
Death Toll: 65 million (including the Holocaust in which approximately 11 million people were killed, and also included the atomic bombings of Hiroshima and Nagasaki in which approximately one million were killed)
2. Genghis Khan (Asia: 1206-27) - The Mongols decides that the world would be a lot better place without all those damn foreigners.
Death Toll: 40 million
3. Mao Zedong (China: 1949-75) - Communist policies badly messed up China.
Death Toll: 40 million
4. Famines in British India (1769, 1876, 1896, 1943) - Colonial policies badly messed up India.
Death Toll: 27 million
5. Fall of the Ming Dynasty (China: 1635-62) - The pinnacle of Chinese civilization succumbed to internal rebellion and external invaders.
Death Toll: 25 million
6. Taiping Rebellion (China: 1850-64) - A messianic uprising of Chinese Christians.
Death Toll: 20 million
7. Stalin (Soviet Union: 1928-53) - The second most evil mustache in history.
Death Toll: 20 million
8. Mideast Slave Trade (ca. 700-1900) - It wasn't really like this.
Death Toll: 19 million
9. Tamerlane (Central Asia: 1370-1405) - A Mongol warlord tried a bit too hard to be like Genghis Khan.
Death Toll: 17 million
10. Atlantic Slave Trade (1452-1807) - Someone's got to do the dirty work.
Death Toll: 16 million
11. First World War (Europe: 1914-18) - Everyone in Europe fought a war to keep everyone else in Europe from getting too powerful.
Death Toll: 15 million
12. Conquest of the Americas (after 1492) - A wonderful New World, free for the taking... well, almost free for the taking...
Death Toll: 15 million
13. An Lushan Revolt (China: 755-763) - The frontier army of China turned against the central government.
Death Toll: 13 million
14. Xin Dynasty (China: 9-24) - China falls apart under a usurper.
Death Toll: 10 million
15. Congo Free State (1886-1908) - The heart of darkness.
Death Toll: 10 million
16. Russian Civil War (1918-22) - Like matter and antimatter, Communists and anti-Communists annihilated one another.
Death Toll: 9 million
17. Thirty Years War (Germany: 1618-1648) - Catholics and Protestants fought over control of Germany.
Death Toll: 7.5 million
18. Fall of the Yuan Dynasty (China: 1358) - Native Chinese threw out their Mongol overlords
Death Toll: 7.5 million
19. Fall of Rome (Europe: 395-455) - The end of civilization as we knew it.
Death Toll: 7 million
20. Chinese Civil Wars (1927-37, 1946-49) - After the monarchy fell, Communists, Nationalists and multiple warlords tried to sort out who was in charge.
Death Toll: 7 million
21. The Mahdi (Sudan: 1881-98) - A Muslim messiah appeared in the deserts along the upriver Nile.
Death Toll: 5.5 million
22. Time of Troubles (Russia: 1598-1613) - For awhile it seemed like everyone in Russia was claiming to be the missing Prince Dmitri.
Death Toll: 5 million
23. Aurangzeb (Northern India: 1681-1707) - The Mughal–Maratha Wars
Death Toll: 4.6 million
24. Vietnam War (1960-1975) - If we let one country go Communist, they all will.
Death Toll: 4.2 million
25. Three Kingdoms (China: 189-280) - Things fall apart. The center does not hold.
Death Toll: 4.1 million
26. Napoleonic Wars (1792-1815) - One man versus the World.
Death Toll: 4.0 million
27. Second Congo War (1998-2002) - Rwanda and Uganda chase rebels into Congo.
Death Toll: 3.8 million
28. Hundred Years War (1337-1453) - English kings claim the French throne for themselves.
Death Toll: 3.5 million
29. Gladiatorial Games (Rome: 264 BCE-435 CE) - We who are about to die salute you.
Death Toll: 3.5 million
http://www.bookofhorriblethings.com/ax01.htmlI know that this list is of the highest number in death toil, but the individual despicable acts of evil were absolutely there and throughout history it has been ever ongoing.