Why people do discrimination against black people?

all these people that have differen skin colours,languages, cultures, came from original human beings(blackpeople). all these people you see in this earth came frome the black woman and black man and i think you have seen or heard about how people mistreat black people in the north america and many parts of eu even genicided though.becouse they are black they have more experience than any other and came first earth. so they want to mistreat em. still exist now, imean why people mistreat their mother and their father, that is all. any comments are welcome and thanks y'all .peace my earth's people