One man's arms dealer is another man's defense against death and destruction. I'm no fan of defense contractors for many reasons, but there is a simple reality that you need weapons, and lots of them, to defend yourself and your nation against aggressors, and someone has to build them. Imagine how much worse the war would be going for Ukraine if they didn't have advanced weaponry being provided to them by defense contractors.
If you don't want arms dealers using your work, then don't release it under an open source license.