Have you noticed all the violence in our world? Every day we read and hear stories about people who commit murder over ethnic and religious differences - things that these people did not choose but inherited.
When these murderers are asked, "Why do you hate people over differences they can do nothing about?" their answers are to tell you stories about how this group committed violence against their ethnic and religious ancestors. So, the violence perpetuates itself.
Well, which group is right and which is wrong? It is according to when you start counting time. If you start from one point in history, one group is right; they are the victims. But if you start at another historical moment, the other group is the victim. You see, both groups are right and both are wrong.
Then what is the answer?