:
The text deals with people who said that, people are not black or white but rather they are mixed race people.
Here for the german people the meaning of my sentence:
Der Text handelt über Menschen, welche sagen, dass Menschen keine Weiße oder Schwarze sind(am besten :mehr sind", aber wie?) sondern Menschen gemischter Rasse sind."
I am sorry for my bad english, but i want to improve it in the future