yes, the sanctions that the US imposed, the 13 years of constant bombing, surely they are someone elses problem.
In the real world, when you hit someone, you are responsible for it. Not Pete or Bob, but you. And before you bring up the argument "well he invaded Kuwait", a country very close to Iraq, I won't say who, did that same thing, occupied a foreign country for a number of years, and never even got so much as a frown in their direction.
As I said, the sanctions included such things as medicine and humanitarian supplies. Items which could in no way be used for a military purpose were prohibited from entering Iraq. First, you blow up their infrastructure, lets say water treatement for example, and then you do not allow them to build it back up. But of course, everyone knows, those water purification plants were really missle silos, right?