I didn't say Trump was a idiot but I did say Hegseth was a fool. Trump may or may not be an idiot but he is a felon, a pathological liar, bully, and all-around A-H. His MAGA base isn't happy with him at the moment over the Epstein affair so trashing AUKUS for enhancing American job prospects (albeit this would be BS) might be a means to pacify the MAGA crowd. All his actions are for what's best for him, not America or the rest of the world for that matter.
Regarding AUKUS, one has to wonder if the USN sees AUKUS as a threat to obtaining delivery on their subs.