What empathetic insight does Willie have about Hally in the tense moments just after Hally spit on Sam?

Willie's insight reminds him that no matter what he has done..... Hally is only a little boy, meaning immature..... a white boy.

WILLIE: Me? Spit at me like I was a dog? [A thought that had not occurred to him before. He looks at Hally.] Ja. Then I want to hit him. I want to hit him hard! [A dangerous few seconds as the men stand staring at the boy. Willie turns away, shaking his head.] But maybe all I do is go cry at the back. He's a little boy, Boet Sam. Little white boy. Long trousers now, but he's still little boy.