I recall reading an article about this by Chuck Colson with regard to his prison ministry. The entire article can be found here:
http://www.leaderu.com/socialsciences/terrorbehindbars.html
Obviously the military is not prison. But with respect to the black muslim question, there may be some of the same remnant hatred of the "white power structure" among some. An excerpt:
"Consider: Youre black, and you believe youre being oppressed by the white power structure. Along comes a person of color who invites you to join the brotherhoodthe most appealing aspect of Islam in prisonsand offers you a means of striking back at your oppressors. If, on top of that, prisoners are taught that the more aggressive they are, the more favor they gain with Allah, you have a dangerous mix."
Thanks for the link sir. I think that comment was dangerously close to the mindset. Scarry IMHO..