More than anything else, conservatives love the feeling that they are winning. Over a rival sports team, over a political opponent, and especially over a foreign power. This is why MAGA won over the neocons so easily, the MAGA shtick is to claim to be always winning.
Many conservatives voted for trump because they thought he wasn't a "war hawk", they don't want the US in wars around the world, they don't want their children sent off to die in foreign lands. So they voted for trump and then got "Department of War", and now a war in Iran, the last thing they wanted.