"Moral crime"?! You've got to be kidding. It was a military action. According to international law, all wars of aggression are crimes. Not "moral" crimes - crimes pure and simple. Iran did not attack the USA or Israel in any way - cybernetically or otherwise. Therefore, any kind of military action against it was criminal.
As for the "how do we know the plant wasn't making nukes" quip - stop swallowing the mainstream media propaganda. We KNOW that the plant wasn't making nukes, because all the major intelligence outfits of USA and the UK told us so. Iran isn't trying to make a nuclear weapon. Iran gave up the idea years ago. The spiritual leader of Iran issued a religious ban against nuclear weapons. It's just the politicians of the USA and Israel who are hungry to find any reason to attack Iran, change its regime and steal its oil. Worked so well in Iraq, didn't it? Oh, wait a minute...
Mikko's comment is disingenuous, too. Decades ago "decisions were made" to use weapons of mass destruction - poisonous gas, nukes, etc. (Remember which was the only country to use nukes? Against civilian targets, at that?) Does that also mean that their use "does not matter" - i.e., is not a crime against humanity?!
Oh, and about "proportional response". The USA (and some other countries) have stated that they will consider a cyber-attack on their infrastructure as an act of war and will feel free to respond with conventional weapons. Does that mean that Iran has now the right to bomb the USA and Israel?
Arrggh, what the world has become! :-( When I started working in this field, virus were just malicious pranks created by juveniles. I was just helping their innocent victims. Nowadays malware is a weapon used by organized crime and the military (is there really a distinction between the two?!). I don't want to be part of this any more! :-(((