Why acknowledge different Races if we can’t implant them into our History?

When I read a History text, I read about English settlers making bold conquests, eventually founding the great and powerful United states of America which preaches liberty and Justice for all. Now, This is true to some extent but isn't America founded on different races as well? Should america even be considered a diverse country if none of the other races fought in the American Revolution? I mean only whites (Europeans) fought. They fought and won. I'm not trying to be racist but all the other races came AFTER. so why acknowledge all the other races if we don't incorporate them into our History? And why should we if they eventually became Americans. Doesn't acknowledging different races highlight potential segregation? Okay, UNiversities for example give Asian Americans a disadvantage because they are from a certain race. Isn't that segregation in a way? aren't they basically saying that there's too much of you, we don't need anymore? What are your opinions?