> What libertarians would probably want first in Iraq is to let ethnic and religious groups to have the control of their own territory and abolish or weaken the central government as much as possible.

Except for the Kurds, that doesn't seem to be want the groups in Iraq want. I wasn't aware that libertarians were generally in favor of imposed religious- and/or ethnicity-based balkanization against the will of the people.

I suspect that would actually work against libertarianism, also, because greater ideological uniformity in the constituency would support more authoritarian government (light touch is a way of accommodating divergent interests which would be eliminated).