Simple: If you do not want any war, you need to know what war is.
"When dictators make slaves of their own people and force their ideas upon other people in other nations, people in those other nations must stop arguing among themselves, and they must fight against the dictators." – Friedrich Kellner[3]
Simple: When dictators make slaves of their own people and force their ideas on other people in their countries, people in those countries must stop arguing with themselves, and they must fight against the dictators.
"You say the war is for a holy cause? I say war causes people to be holy." – Friedrich Nietzsche[4]
Simple: You say war is for a godly cause? I say war causes people to be godly.