I'm pretty sure that this article and the site it pertains to are very dodgy - first they mix up shia with sharia law, and then seek to make a connection between extremists and 9/11.
I don't think it matters too much to them the type of extremist, but using a muslim one would push all the right psychological buttons, and has the added bonus of embedding a relationship between CTers and extremists in the psyche (of some)
In theory, people who read this would then equate CT's with extremism - although I have to say that IMO it's a pretty poor attempt at manipulation.
It may be worth keeping an eye on fox to see if they run similar stories over the coming weeks/months.
It looks like the battle between the MSM and alternative news/conspiarcy angles is on



