1. People know in their hearts that it is wrong to kill other people. They know it is even wrong to hurt others. They know that it is wrong to steal. They know that it is wrong to do all kinds of other things. Yet they allow themselves to get whipped up into a military frenzy by Government leaders so that they go out and murder all kinds of other people in the thing called war. This personal allowing of whipping up has converted their good sense into religion - Government or war religion - just the same as religions like Christianity motivate for peace.
2. Some formal religions are war religions in their religious writing directives. Some are peace religions in their religious writing directives. People constantly interpret their formal religion the wrong way, and show it when they do not follow the things that their religion says.
For example. According to the Koran, Islam is a religion of peace toward fellow Muslims in good standing, but a religion of war against all others, and especially apostates. According to the Bible, Christianity is a religion of peace towards all people. But these are formal religions. Informal religions often do not even recognize that they are religions. Yet people do whatever they want, often in deference to their formal religions.
3. The religion of God is to show and know the truth, period. This is done through peace. Without peace, nothing can exist.
4. The religion of the devil is to follow the devil as one should follow God. The devil doesn't care if people recognize that there is a God or not. All he wants is that people follow him knowingly or ignorantly. His goal is destruction.
The God over all is the One Who maintains everything by the means of all-pervading cause and effect. He is the one who maintains the peace of the universe within itself, even in the face of the evil and destruction set up by the vastly weaker devil.