Well when you google searching for such a law in New Jersey you get nothing, which sounds like you making shit up.
New Jersey has no such law that would apply to whites only selling drugs.
Searching New Jersey Unruly behavior law is coming back ZERO.
the closest you find is N.J.S.A . 2C:33‑2 which is for disorderly conduct....which would be for
A. Improper behavior
The first category for disorderly conduct is for improper behavior. A person is guilty of a petty disorderly persons offense, if with purpose to cause public inconvenience, annoyance or alarm, or recklessly creating a risk thereof he or she (1) Behaves in such a way that may be considered violent, threatening or tumultuous fighting. (2) Creates a condition through no legitimate means that may be considered hazardous or physically dangerous.
B. Offensive language
The second category for disorderly conduct is for offensive language. A person is guilty of a petty disorderly persons offense if he or she uses unreasonably loud, offensive, coarse, or abusive language. This language must be used in a public setting and the disorderly person must be in reckless disregard of offended another's sensitivities. For this statute "public" is defined as a place that a substantial group has access to. Some of the places defined as "public" are highways, transport facilities, schools, prisons, apartments, businesses or neighborhoods
Both are misdemeanors and don't just target whites.
So again GTFO.