All nations have been horrible and commited atrocities in history no one is clean some worse then others, just take a good look and you shall see.
Start with the conquistadors and the conquest's, look what happened to the aztecs and incans especially the aztecs as that was not pretty it was one big slaughter on both sides, millions dead etc, they said that a conquistador was night impossible to kill for a aztec with all the armour, rocks dont pierce steel.
Though most other tribes hated the aztecs and their brutal reign and helped the spaniards, tons did and taking the emperor hostage was also a great move same there else they would have died. Hernán Cortés was not a nice guy btw, now imagine of the aztecs where nicer to others maby they would all have united.
Watch this for some nice history carnage
Brutal men though brutal times.
Still just one of many history events.
To your question i dunno just liked to add some history