This article is by a reporter who has been in Libya several times and did a lot of reporting with the rebels during the civil war.
http://www.worldaffairsjournal.org/b...embassy-attack
Her reading is that they are mostly pro-US and very anti-Islamist but it is hard to deal with with the hard code nutjobs since:
"..most of the Qaddafi-era police have not returned to work, the new internal security forces are still embryonic, and there is effectively no Libyan army at the moment."
Extremists can do very well when there is no central authority to squash them.
Steve