I am really astonished at two things that are being underplayed here.

Juicy Brucie fails to see that "What are YOU doing HERE" is a remarkably clear equivalent to "Hey nigger, what are you doing in the white part of town".

Second Juicy Brucie can assert that Martin should have been respectful. What should he have said - "Yassah massa boss us jokie folks allus happy to clean yo'shoes"?

Brucie's argument rings with racism.