Almost all conscious rap and conscious rappers are NOI influenced in some capacity
NGE comes from it and was strong in the NYC streets in the late 80's early 90's right before the Blood thing popped off.
Rakim, Kane, Brand Nubian.... even Ice Cube was down and pushing their messages on "Death Certificate".
Then what some would call a race war popped off in Rikers and some of the street dudes who were NGE ended becoming Blood affiliated. Those principles and codes can get in the way. Watch Half A Mil's documentary for a good example of how the street NGE dudes ended up co-mingled with the Bloods and how it doesn't mix well.
The Blood thing popped off because NY prisons and jails cracked down hard on Five-Percenters by the mid-1990s. Before 2004 they also had NGE designated as a "gang". The "Black car" used to be led by Five-Percenters and Muslims, but suddenly Five-Percenters weren't even allowed to proselytize. The "Latino car" was led by the Latin Kings and Netas.
By the time NY prisons and jails loosened their restrictions on NGE, the damage was already done. The NOI and NGE were both less influential in NY by then, meanwhile, the Bloods themselves were allowing Latino and other races in. Muslims are still powerful in NY prisons but they're predominantly Sunni. A lot of Crips and GDs become Muslim nowadays.
Also in the late-1990s (or sometime around then), the Netas from Puerto Rico sent the order to dissolve Netas at the street level. It was to return to being a prison gang only. The Netas numbers in the prisons went down whereas in the streets it collapsed entirely by the time of the 2000s when the Blood shyt really took off.
Then in the second half of the 2000s, a lot of new homegrown New York gangs started forming; the two biggest Uptown were the YGz and the YBz at the time. Most of the new homegrown gangs were also ethnically-inclusive from the jump. Most of the gangbanging in NYC is by the homegrown gangs (including Trinitarios and DDP), Crips and GDs.