the human race is at fault, is a product of society, war was going on before he was born and after, he isnt evil, he truly wants peace but by any means...had naruto just let him use infinite tsukoayami none of these shinobi would be dead..
it is tobirama's fault for madara's current goals, because tobirama purposely walked in hashirama's room and talked about madara knowing madara was listening outside of the window and had the never to say he wasnt kneading chakra when hashi asked him did he sense someone outside of the window, all which lead to madara's belief that he doesnt belong in his co-dream that he and hashirama built which lead to his defection of konoha, and tobirama is the reason the uchiha are dead because he feared them, he feared what they could become and he feared that a new madara would rise up from the group so he created the police force and appointed them in control so he could keep an eye on them and he forced them to live on the outside of the village further pushing them away not only that but he knew everyone hates the police so basically everyone hated the uchiha because they were the police...
but the human race is the main problem, people hate each other because they dnt understand each other...people hate what they dnt understand