Supposedly Hassan Sabbah's killers were high on Hashish (means grass in Arabic--I studied Arabic and knew at least that) Assassin is some corruption of Hashish.
Anyway, William Burroughs made a record where he takes the persona of Hassan Sabbah and rails against Coka Cola and all the rest of it.
I have this record. It is exactly like a Bin Laden Fatwah except that this is before Bin Laden. I mean Burroughs is from the BEAT Generation.
Burroughs lived in Boulder sometimes. He mostly lived with his guns in a shack in Lawrence Kansas.
He used to carry a walking stick with a sword in it.
And he had a tasor before any of us ever heard of it.
The Communists have a long history of using minorities and people with grudges for their own purposes. They played on nationalist resentments against colonialism all over the third world. They played on black resentment against America (e.g. Paul Robison). They played on Indian resentment against Hispanic rulers in South America. The hatred and resentment of other people are useful tools for them.
Muslim terrorists obviously see the same opportunities--to convert black criminals in prison, for instance, or to ally themselves with the Basques in Spain.
So filiations among Communist radicals, Muslim terrorists, and AIM would be all too natural. Real Indians with a sense of pride in themselves might not fall for this stuff, but marginal and resentful Indians who blame the white man for all their troubles very well might.
The only point you suggest that I find hard to believe is that they would kill this little girl because of the coincidence of a name. I'd look for some other connection, maybe, between the parents and AIM or other Indians. How much does an unsolved murder case really hurt the FBI? What AIM needs is more along the lines of another Ruby Ridge, some means of stirring up hatred between the FBI and the Indians, and this really doesn't do it.