Di kita masasagot ng diretsohan ts. Pero ito natutunan ko sa tanong mo na "why we hate?" Sa anime at games ko lang sila napulot. Pero maaring maaply in real world. Hope i can give some hint through sa mga quotes na to.
When a man learns to love, he must bear the risk of hatred.
-Madara
In order to understand true peace, you must understand true pain.
-Pein (Nagato)
If you want peace, prepare for war!
-Silvana (ML hero)