Andrew Arena is the FBI special agent in charge of this investigation. Years ago Debbie Schussel wrote an article condemning him. He is a muslim.
There is also one muslim member of the mainstream Michigan Militia, and it was this person who refused a call requesting help by the Hutaree when the FBI raid began. His last name is something like "solani" OR something, I can't recall; he converted to Islam in the late 90s.
I can't recall all the exact details, but I think that if you do a search under keyword: andrewarena, that you may find out more details. I'll try to locate some links for you later on.
If I were running a militia, a by-law would be “no Muslims allowed”. This whole thing is mysterious.