Who can say Black Americans are the same Africans slaves brought to America?

If so how will you answer the question that when you trace the family tree of ALL Black American there was always a White man beginning the family tree of Black Americans?
All the iconic Black leaders like Fredrick Douglas had a White man to start his family free!

I don’t understand how you all can argue against the breeding process when you see it in slave movies and school books how the slave mother had to take her daughter to the BIG-HOUSE to be screwed for the first one by the slave-masters is baffling to me!