They did not and they are not. I'm not debating this, I'm telling you. They supported him and his cabinet being open about wanting to bomb Iran leading up this. They supported him and his cabinet when he bombed Iranian officials in his first term. They still support him and his cabinet after this. They are supporting him in his continued threats against Iran. Whatever it means for them to be "upset" in regards to this it does not translate to any opposition to his actions past, present or future with intent to bomb Iran. I don't even know what you mean by it. They lit fireworks in my neighborhood right afterwards in the suburbs of west Florida where there is no shortage of Trump supporters. Were they fireworks of anguish? Were they so very cross at him? No, of course not. I have not come across a real world Trumper that thinks the bombing of Iranian nuclear sites was a mistake. Those people are outliers and their discontent has no call to action and is therefore meaningless in the realm of politics where they will vote for it again and again. Call me a Calvinist if you must: only actions matter.

The problem with this discussion is that his "base" is being treated as a monolith when the fact of the matter is there are both significant numbers of isolationists and warhawks who are diehard Trump fans. I don't know what the breakdown is for the percentage of each one, but I think it's probably safe to say that the majority of Trump's base doesn't care about his choice to bomb Iran. They'll cheer him on as being tough for uhmuricah when he does drop bombs but pretend they always said they're "against unnecessary war" when he babbles his isolationist rhetoric.

Most of his base is vastly more concerned with his backtracking on his promise to release the Epstein files than they are about Iran.