Terribly sorry old bean.
I assumed that when you used the term 'Massa' in your witty(?) little pastiche you were racially stereotyping an African person, whereas in actual fact, you were.......er........ racially stereotyping an African person.
The term 'Massa' is a derivation of Master and as such implies subservience.
I was intruiged by your sentence "Racist" is not purely "black" people.
What exactly does that mean?
Oh, and yes, I AM assuming you're a white man. If you're black, I'll eat my bowler hat, umbrella and briefcase.