If you want to include proxies then you'd have to include all who support the proxies, and also include the USA on the other side, including NATO. So is that the point you wish to make here? China would also have to be included on Iran's side by the way.
> I'm not sure if the "who started the war" question is that clear-cut.
I think it is clear-cut. They refer to Israel and the USA bombing Iran. That's very clear.
If you want to go back to history then we have more actors. But it is clear that they refer to the recent start of the war. Right now the USA is still at war against Iran too; that Israel is permanently at war with Iran is also true.