among the last to be won over to the "not guilty" verdict. 

Does the drama demonstrate that tolerance can overcome anger and bigotry? In a sense, perhaps, but in a sense, no. The man who is angry is projecting the anger he has toward his own son onto the defendant, who is about the same age. It is not clear whether he understands himself why he is so angry and why he feels anger toward the defendant. In the 1957 motion picture version, the man accidentally pulls out a photograph of his son near the end of the drama, and when he sees the picture, he tears it up, then breaks down crying and mutters, "Not guilty." It appears he realizes at this point that he has concatenated the two boys in his emotions, and this realization allows him to break the emotional link so he can vote "not guilty." It is not tolerance that overcomes his anger, but the peer pressure from the other men that forces him to recognize the root of his anger and separate it from the case at hand. Whether he remains angry at his son or not is unclear, but at least it appears he is able to release his unfounded anger toward the defendant.

The example of the bigoted man, Juror 10, is also interesting. He refuses to consider the evidence in the case because his mind is made up about the defendant's guilt based on the defendant being one of "those people." The ethnicity of the defendant and the part of the city he lives in, the slums, are enough to convince the man of the boy's guilt. At one point in the trial, the man goes on a bigoted rant, and the other jurors respond by turning their backs to him or moving away from him while he is spewing his prejudice. Eventually one juror tells him to sit down and be quiet and to not speak again. It does not appear that the juror has changed his opinions about the ethnic group and become more tolerant; however, he does change his verdict to "not guilty" at the next vote. Again, it is the peer pressure brought to bear on him by the other men in the form of a public shaming that causes him to change his vote, yet we have no indication that the man has become a more tolerant person. We can hope that he will take this lesson to heart, but the drama gives us no indication that will happen.

For these two jurors, anger and bigotry interfere with their ability to see the facts clearly. Significant peer pressure brought to bear on them by the other jurors results in them setting aside their anger and prejudice for the moment, but there is nothing to show that they have learned to be more tolerant of others. If one imagines how those jurors behave after the jury disbands, one could see two scenarios play out: one in which each man has learned to be more tolerant, and one in which they continue in their anger or prejudice. From this drama, it is more accurate to say that appropriate peer pressure can result in the suppression of intolerant behavior. 

Right from the start, it is clear that juror #10 is a racist bigot. He believes the accused is guilty, and his main argument of support is that the kid isn't white.

You're not going to tell us that we're supposed to believe him, knowing what he is. I've lived among 'em all my life. You can't believe a word they say. You know that.

Juror #9 immediately steps in and calls juror #10 out on his racist and skewed logic, but the other jurors aren't exactly racing to support #9. A few of them are likely in full support of #10's feelings; however, as more and more evidence is brought into question, jurors start changing their vote to "not guilty." #10 simply won't be convinced. He believes that the kid is a liar and absolutely guilty, and #10 repeatedly makes comments that connect his feelings to the defendant's race.

I don't understand you people. How can you believe this kid is innocent? Look, you know how those people lie. l don't have to tell you. They don't know what the truth is. And lemme tell you, they— (NO.5 gets up from table, turns his back to it, and goes to window.)—don't need any real big reason to kill someone either. You know, they get drunk, and bang, someone's lying in the gutter. Nobody's blaming them. That's how they are. You know what I mean? Violent!

As more and more jurors change their vote, #10 gets angrier and angrier.

I’ll tell you something. The crime is being committed right in this room.

Eventually, the logical arguments turn #10's opinion. The evidence that shows that racial prejudice is overcome is the fact that #10 changes his opinion, and his racial prejudice is overcome by the patience, determination, and logic of juror #8.