Open Question: When will humans stop?

Tension between whites and Blacks has always been there, which is totally wrong, people always find reasons to hate their fellow man for the dumbest reasons. If for one day white supremacists or KKK are not hating against blacks,Jews other colored people than people in Kenya are hating and killing their own people for being from a different tribe even though they all are (blacks, Kenyans or Africans)..... Does that make any sense?. In India rich or high cast people are still prejudice against the poor and low cast people. There has been tons of Hindu/Muslim riots in which thousand have died cold blooded including women and children even though they all are Indians.. does that make any sense?. So even if this world had only one race.........It would still kill its own mankind for one reason or another. But I would like to ask the community why so much hate, Have you not learned anything from the history, Hate only destroys and love brings peace. Thank you to all reading this article.