Holy war oxymoron

I think that ‘Holy war’ is as much an oxymoron as ‘cafeteria food’. This is because of the definitions of the two words. The definition of holy is: having a spiritually pure quality/entitled to worship or veneration as or as if sacred, while the definition of war is: armed fighting, as a science, profession, activity, or art; methods or principles of waging armed conflict. These are very opposite definitions. The very idea of a war fought over religions is ludicrous is you look at the fact that most religions are strongly against violence. I think the whole point of holy war is either that the two opposing religions want to change something about the other religions because it’s different from theirs, or the two sides want to fight and are using religion as an excuse.