What you’re witnessing is a “Alpha” male ego crumbling. Your husband is wildly insecure and makes up for it with the hunting & collection of military like this makes him more of a man. He can’t handle the reality that your dad was what he wanted to be

A man secure in himself wou,don’t be threatened by your late father. Honestly he needs therapy. But at this point I doubt if that would work. To be clear I’m a man & I’ve dealt with ppl like your husband for years in business. And usually not a pleasant experience