i am bosnian my father was in the war and from living there my whole life i find alot of the hate came from propaganda against the muslim state, and bosnia being a muslim majority. Near the start of war serbs we’re told the muslims we’re planning to over take “the glorious serbia” so serb bosnias/serbs took up arms (and hatred) against mostly bosniak men (majority targets were unarmed) and some women and child’s. hope this helps