Actually, I think there's a quite legitimate question here, as to whether he is simply a Muslim, or a "Black Muslim" - not to refer to his race, but to whether or not he is an adherent of the Nation of Islam. If the latter, we are not dealing with a typical Muslim or a Wahhabist, but with a home-grown gang of racist Muslim wannabes. That becomes a whole different issue to deal with. Calypso Louie has been saying some fairly inflammatory things to his followers, and this fellow may have taken him at his word.
On the other hand, he may just be a nut case who turned to NOI to try to get some stability and order in his life. (In other words, membership in NOI may be a symptom rather than a cause of his behavior.)
It will all come out eventually. There is too much info available on the web (esp. at FR) for the truth to be suppressed -- whatever it turns out to be.
The local CBS affiliate in Dallas showed a scene of him being lifted off of the ground in handcuffs.. the right side of his face was swollen so bad, he looked like the elephant man. Looks like someone got a piece of him.