Barbaric Giants

Barbaric Giants are the kinds of giants that would be considered "morally evil" by the common person.
Bloodthirsty savages who hungered for warfare, the Barbaric Giants gave all giants a bad name with their "senseless, aggressive" style of warfare, attacking and pillaging everything they came across. The fact that they were the most numerous of the giants made the problem worse.
Lacking the knowledge of farming and animal domestication, they extorted or pillaged Peaceful Giant settlements for food and supplies. In some cases, nomadic tribes of Barbaric Giants settled in areas that overlooked Peaceful Giant Settlements and demanded "tribute" of food every set amount of time, lest the Peaceful Giant village be destroyed. Many Peaceful Giant tribes did not have an army, and thus were in no position to fight back. Only the largest of Peaceful Giant settlements had an army.
The War of the Giants resulted in the near-eradication of Barbaric giants; only 300 giants, representing 5 of the 189 tribes, survived the war, 23 years of living in the frozen North, and the voyage to Elbaf.
On Elbaf, once the senseless aggression was done away with. Barbaric giants were "absorbed" by the warrior giants, and a couple generations of "cultural evolution" resulted in the disappearance of "pure" barbaric culture.