I’d call it ‘having a different opinion to you’.
Nope, that would just have been “war materiel doesn’t interest me“, as opposed to “war materiel doesn’t interest me, and anyone who is interested in it needs to grow up“, which, paraphrasing, is how you came across. One is a difference of opinion, one is passing judgement [from a high horse].
Though the fact that our biggest engineering projects are usually military is in itself a lot sadder than the retiring of an aircraft carrier IMO.
Not always – Concorde being a notable exception. And all the more more awesome given that when the SR-71 Blackbird spy-plane (and the MiG25 designed to shoot it down) were retired, it was the fastest plane in the sky. And its passengers and crew could drink champagne in comfort, not have to wear flying suits and oxygen masks.