http://www.foxnews.com/science/2016/07/15/1-5-million-year-old-footprints-reveal-human-ancestor-walked-like-us.html

Maybe his fight for survival kept him too busy to work out how to  hate and murder.  Maybe he had a crystal ball telling him nothing lasts forever and that there will be 3 World Wars and that in the end humans will be no more. Maybe he knew they would become the cancer of the earth.  Who knows?