Hello Jake,
In a broader sense YES, Black Americans are part of the Black race. But, still we are not the same people.
Consider this, a Crow bird is part of black bird race if you will, but still the Crow bird is not the same as a Haven am I right.
I like how you presented your argument and how you backed it up. It shows me that you are thinking and thinking is reasoning and this is how one race of people becomes superior to another race of people.
Now, most people associates superiority with negativity, but the word only means that I am ahead of you in all things.
I know that you are a reasoning man and that is why it surprises me that you would run from my question that Black Americans are a new race of people when I ask you did slavery had in this country for hundreds of years and you run from answering that question.
A reasoning man also knows that when he is was he must change course.