Seems to be a white and black MC argument
I’m guessing but the racial aspect is probably incidental.
Id guess drugs, guns, territory or some other financial interest that both groups were capitalize on was what touched it off......and I also suspect there was at least one other incident that led up to this......most times something had been brewing for a while.
I don’t think you have to use a strong term like argument. Maybe just a gentlemen’s disagreement. That escalated. A bit.