We don’t hate each other actually but historically it is about wars of course. If you understand Greek part, then Turkish part is about our Independence War. After WW1, after the fall of Ottoman Empire, new Turkey was struggling because of the invasions and rebellions. At the time of Independence War, Greeks with the support of the UK and some other western countries started to attack from Turkey’s west to inner Anatolia. In the end, Turks won the war. That’s all but don’t think we hate each other, it is just a rivalry.