Yes, you obviously don't understand, so I'll try to explain it in simple terms. The original protests were to show the objections of black people to having their people shot and killed by police in numbers far disproportionate to their population.
The recent protests became also against Trump for his distortion of the facts as to why there were protests. The protests never were about the anthem or flag, but rather about racism. Trump used that excuse to increase the divisions by catering to his mainly white, and often racist base.
Got it?