Squabbles between neighbors do escalate at times. What was the involvement of the gang in this dispute? Did they seek to intimidate the white neighbor?
Black on white assault is rarely called a hate crime in the media. Doesn't defend neonazis taking up your cause, just seeking background.
I'm not sure of everything but apparently the white guy of the fence fight posted on a BBoard and it caught the nazis eye and they decided to march in the black neighborhood.