Yes, because many people are in the habit of tracing back the "wrongs" only far enough back to reach a convenient stopping point, as if the trail didn't stretch further back from there. Additionally, "two wrongs don't make a right" refers to tit-for-tat actions, not a series of otherwise unrelated events. Tribal warfare, regardless of the continent on which it occurs--or the timeframe in which it occurs--is a trait of the species, not the exclusive domain of people looking to laminate their Victim Card in the present day.