blacks and the diversity among US

I JUST WAN TO KNOW IF OTHERS HAVE EXPERIENCE PERSONALLY OR KNOW PEOPLE WHO OFTEN DOWN GRADE ANOTHER BLACK PERSON SIMPLY B/C OF HOW DARK THEY MAY BE AND UPLIFT A PERSON WHO WAS LIGHTER IN COMPLEXION....GROWING UP IN NAIJA PART OF MY LIFE IT WAS VERY COMMON THAT PPLE BLEACH THEIR SKIN SO I ALWAYS THOUGH THAT BEING LIGHTER WAS BETTER BUT HAS I GREW UO MY VIEWS CHANGED..... IN THE STATES THIS IS ALSO COMMON NOT JUST AMONG IMMIGRANT BLACKS BUT ALSO BLACK AMERICAN...I ONCE VIEWD A SHOW WHERE A DARK SKIN WOMAN ADMITTIED TO PUTTING ACTUAL BLEACH IN HER LOTION FOR HER AND HER KIDS B/C SHE HATED HER SKIN TONE.....SOME BLACK AMERICANS OFTEN TIMES WHEN WANTING TO COMPLIEMENT ANOTHER DARK SKIN INDIVIDUAL THEY ALWAYS SEEM TO HAVE TO ADD THE SATEMENT " FOR A DARK PERSON " EXAMPLE...I HAVE A FEMALE FRIEND WHO WORKS AT A CLUB SHE IS BLACK AND DOMINICAN BUT IF YOU WHERE TO SEE HER HER TONE ANS BODY FEATURES WE WOULD ASSUME SHE WAS BLACK WITH OUT THE MIXTURE ANY WAYS ...A MAN GAVE TOLD HER " YOU AREE SO PRETTY FOR A DARK SKIN GAL" WHEN SHE TOLD ME I TOLD HER I WOULD HAVE BEEN OFFENDED...WHY CANT SHE JUST BE PRETTY WHY DOES IT HAVE TO BE B/C SHE IS DARK SKIN...PERHPAS I READ TO MUCH INTO THE STATEMENT BUT IM AWARE THAT IN THE HISPANIC CULTURE EVEN THOUGH SOME OF THEM ARE BLACK LIKE ME THEY ARE KNOWN TO DOWN GRADE THOSE DARKER THAN THEM ( but thats annother topic).....so pls share your personal view oin this matter... are we self hating, what is the issue with the division amongst us