THE ARABS AS A BLACK PEOPLE AND WHY THIS IS IMPORTANT TO KNOW!

The Quran says "May the truth come and may it defeat what is false." Many Muslims claim to be tolerant of all races and colors but why is it that when many non-black Muslims are told that their ancestors, forefathers or other important leaders of the past were black, they literally freak out and go into denial mode as if this just could not be?! These truths cause one to question. If the Arabs were originally black, who are the non-black Arabs today, and how are they Arab? Is it okay for most Muslims today that the last prophet (pbuh) and his people were a people that were black like many black Africans? Because I know people often hide their true feelings in order to be seen in a good light, I have brought up this topic as racism is Iblees' sin and it must be obliterated from our ranks.