While I do not agree -- not fully, at least -- I appreciate that you have provided a thoughtful, rational response to the OP. Thank you for this.
I agree that the US broke Iraq. However, the policies that President Obama has had since 2009 are worth questioning. Not in the rabid manner of the republicans, of course. But he did provide support for a government that denied rights and representation to a significant population. And that government bears some responsibility for breaking Iraq, too.
The idea of a transitional effort sounds good. In fact, I can see both how and why sincere people would support that idea,with that goal. But it has become blurred, at the very least, because the people of central Iraq are intent upon re-establishing what they believe is their nation. I doubt that any military effort will prove successful in postponing that from happening for very long.
VP Biden had advocating the separation of three distinct areas within Iraq. It may have been possible, even as late as 2010, to have done this in a manner that allowed for a coalition government. But I suspect that it is too late to attempt to influence the population there today.
More, I do not think that it is likely that the other Islamic states will limit their activities to supporting President Obama's actions for long. Rather, we face a very real possibility of having a regional war within a year's time.
I admit that I do not know what the "solution" is today. And that it is easy to view things with that old 20/20 hindsight. But I do not believe that we are going to bring about a positive transition.
Again, thank you for your post. It is much appreciated.