That it is, but I do agree heavily with the emphasis of the OP, "If it gives you joy or makes you proud or you try to get rich from it". The action itself should never be something to have any positive emotion about. War should reflect that, as something that is not desired, not even to be proud of, except in the context of being done swiftly and with the goal being to resolve it.
Edit:A sidenote, this is actually a topic of discussion in an Ethics class I have at church. Some people are surprised how many people there find war reprehensible.