God can stop war without killing people. He can program the robots made of flesh and bones as he likes. But his thoughts are different. God is responsible for what he had created on this earth and human beings are responsible for what they have created on this earth. God had created spirits too for various purposes. All creatures are ruled by spirits. All creatures except human beings are 100% under the control of the spirits. Human beings by their sixth sense (which other creatures don't have) can live by choice. The spirits will possess them only according to their choices. But after the possession, the human beings will be ruled by spirits. A democratic rule.
God never bothers who believe in Him. God cannot watch each and every human being at the same time and cannot live with each and everyone to guide them. That's why He had created different kinds of spirits for various purposes. He had made the spirits to watch, guide and determine the destiny of the human beings from their daily activities, talks and thoughts too. Your past determines your present and your present determines your future. God has given freewill to all creatures including human beings. According to this, all human beings have all right to live a life as they wish. But if it happens to be bad and hurts someone, they have to face the consequences. These consequences are created by spirits. It's a natural system. After death no one lives in any form. Heaven and hell are only for spirits. Spirits are separate elements. A human being is not a single spirit. A human being during his/her life time is living with many spirits which have joined one by one since birth. They are knowledge, skills, feelings, emotions, interests and everything. Even thoughts are not your own. For example, when you want to take a decision on a subject, one after another the spirits think and you just listen, choose or reject the ideas which they transmit to your mind through your brain in the form of thoughts. Brain is just a media to connect the spirits to your mind. A mind is just a computer's mind. After the destruction of a computer completely you will not get it's mind. The same is the case with the human beings. Soul is nothing but an energy needed for the functionality of a body. It is not a spirit or anything else. A human being is just a robot made of flesh and bones and a toy of the spirits for their games.
God knows how a deer suffers when it is eaten by a lion. What do you understand from this? There is always a common fate which is always applicable to all creatures including human beings. That is, we are like other creatures except that we have an additional sense (sixth sense). This sense had changed only the living conditions of the human beings but not the fate. The fate is almost same to all creatures including human beings.