Even though you don’t have a peer reviewed cite I will run with it.
Utes and Commanches trained their young to protect their tribe.
Scum like Vick breed these dogs to fight so that they can bet on the outcome and then kill them at the end of their career.
I am part American Indian and for you to compare their actions raising children to pieces of shit like Vick is enough for me to wish doom on you.
Sorry, that likely sounded worse than was intended. I was pointing out that there actually are both people and animals who are inherently warlike.