What is the tone that Trueblood uses to tell the story of his incest in Invisible Man

Uncovering further along this line of pretence, Jim Trueblood mentions how the white community had been surprisingly supportive after the incest. THere is a tone of justification, even moralizing to his heinous act. He is effective in his speech with Mr. Norton, who also rewards him monetarily for his act, because it is without pretense. His very name is suggestive, as he is true to his blood, his nature. This manner thus guilts the white community into paying off the state they have created whereas it shames the black community who does not want to recognize any who could work against their success.