I'm not even sure that it's the Nation of Islam itself, rather than this Nation of Gods and Earths, or some other such group, or even simply a general call for violence among black separatists.
It seems the goal would be to get the message out clearly to the true believers, but to couch it in language obscure to mainstream America.
However, I still don't see why they stopped hiding and essentially let themselves get caught. Ordinarily I'd say that there might be no reason, just a mistake on their part or emotional exhaustion. But the "duck in a noose" message right before they were captured strongly suggests that they let themselves get caught on purpose.
No it doesn't. Show me even one version of the tale in which "the duck in the noose" gets caught. The duck in the noose always gets away. Since the sniper is "like a duck in a noose", I'd say he got away with $10M...
Does that mean I think these guys are innocent? No. I just think they were protected by someone bigger who found them to be useful idiots--then killed two birds with one stone. By giving them up, he got rid of them--and got $10M for his next project...