A list of nations who put children in prison would be long indeed. China uses slave labor camps, and has a quite cozy relationship with american business. We are currently buddying up to the Sudan, despite the fact that they still practice slavery. Pakistan is our "friend", despite the fact that it is a fairly repressive military dictatorship. Turkey is our "friend" despite their persecution of the Kurds.
If Iraq has an oppressive dictatorship, then it is incumbent upon Iraqi patriots to overthrow that regime and replace it with a better one.
In either case, as John Q Adams once said "America does not go abroad in search of monsters to destroy" and "We are the well-wisher of liberty everwhere, but the guardians only of our own"