Reference request: blame as the source of anger?
He abused me, he beat me, he defeated me, he robbed me of my property. Whosoever harbor such thoughts will never be able to still their enmity.
Never indeed is hatred stilled by hatred; it will only be stilled by non-hatred — this is an eternal law.
— Dhp., vv. 4-5

(Source: The Elimination of Anger: With two stories retold from the Buddhist texts by Ven. K. Piyatissa Thera)
The bolded text implies they blame the other for one's plight.