The simple and truthful thing to say was that the US had no evidence of nuclear weapons being built and so we are unclear of any justification for this strike - or simply not comment on it if he doesn't want to anger the US. Australia does not want to be dragged into another war of aggression to help America's oil&gas and militarily-industrial industries.
But that was apparently too much to hope for.
Albo's better than any Liberal party leader would be, but we can do much better.