Anger is a key, yes. But the more I self reflect the more I understand. I came to learn that it's not really the anger itself but it's the specific reason/motive behind the anger. In other words, it's my emotional stability. I happen to love very strongly. And as I must admit, sometimes my love can become more of a need or an addiction. And if that object of love is lost or taken away, an even more powerful hatred replaces it. Hatred+Emotional pain=Bloodlust. Maybe this is wrong but it's the best I can come up with.