Oxymoron: Holy War

The phrase "Holy War' is an oxymoron because holy is the opposite of war. The definition of holy according to dictionary.com is specially recognized as or declared sacred by religious use or authority, and the definition for war is a conflict carried on by force of arms, as between nations or between parties within a nation. They are different because holy is related with religion, and war is related with conflict. They both don't go together. Many conflicts in the world today are based upon religious differences, yet all major world religions condemn killing. This is because most religions want others to join their religion, so they think that war is an exception.