Part of me thinks that, based on his conduct over the recent years, Elon Musk is exactly so stupid that he never considered that if his company supplies gear for a military, they're going to use it to do, like, military shit, and now he's having a real crisis of conscience because he just never thought that his stuff would be used for, you know, war.
But on this occasion, I'm pretty sure Hanlon's Razor won't apply. Even if he said "Yes, I've been really really stupid about this and I'm a stupid little boy and you can quote me on that, put it on a shirt, make a Netflix documentary about it while you're at it", I'd still think this is is obviously a smokescreen and he's being Putined one way or other.