Blacks over Reds

In Native Son, Bigger Thomas convinces himself that his fabrication of Mary's murder is easily believable not because Bigger is brilliant in his deception --rather Bigger believes that his word as a colored person is more credible than Jan's, who is a Communist sympathizer. The question is, does Bigger, who is blatantly guilty of murder, have a reasoning behind his belief? Does Bigger's plan really hold up, despite the fact that Bigger actually did commit the crime? Historically speaking, the story takes place around a turbulent ideological state where Communism is being picked up from one side of the society and the other side is strictly against it. If Bigger lucks out and manages to convince enough of the right people, Bigger could possibly get off of his crime. (Honestly I'm doubtful of this because of Bigger's furthering plans of taking ransom money, perpetuates the tangling web of lies Bigger caused for himself.)