Yes, your reading of the situation is otherwise pretty wrong, too. If you'll note, the new ISIS victories are concentrated on the border, because that was the epicenter of their activity to begin with. We've largely stopped hearing about their progress in the direction of Baghdad--probably because there isn't any. At last report they were stalling out as they actual Shia areas. This dynamic makes it unlikely they will seriously threaten the capital. Further, that was a pretty gross misrepresentation of Grand Ayatollah Al-Sistani. While he did indeed make a call that was largely heeded by the Shia militias, he's been quite forceful about the fact that people shouldn't do this with a sectarian attitude. In fact, long before John Kerry said anything, it was he that was demanding Maliki take steps to form a more inclusive government in light of the crisis. Finally, Kerry's request is not entirely unreasonable, either. Mass desertions are above all, at least an implicit statement that many troops did not find their government worth fighting for. The only way to change that is to institute some sort of confidence-building measures.