NOI may have an odd take on Islam, but it has never gone in for attacks on others, lite or otherwise (the exception proving the rule being Malcolm X), especially in any sort of political way. Maybe they harass low-level competition or ex-members; I wouldn't know.
I agree on the silliness of military-connected explanations of the snipers' behavior.
mbs
The Guardian reports that this guy associated with the Nation of Islam, which for all practical purposes is a homegrown al Quada lite. Military personnel generally do not wander around killing civilians when they are not odered to do so, that is a "gangsta" thing to do.
Wojtek