To clarify, when asked to address a problem as a whole, rather than a single niche component of the problem that this thread focuses upon, I offer more comprehensive positions.
Threads tend to deep dive on a particular topic, but I see no indication that anyone posting here is advocating that it is all about religion and nothing else matters.

While you may offer more comprehensive positions, you don't offer realistic comprehensive solutions. You offer ideas that our government doesn't support such as the division of Iraq. I tend to agree that may be the best answer, but we really don't know if it will work, or if it is in our interests to allow this. Recommendations to be valuable have to be in line with policy guidance.

Legitimacy is certainly an issue, but it will seldom be an answer to addressing conflicts where there are multiple versions of what legitimacy is. Most of the violence is over identity groups attempting to establish their version of a legitimate government.