To accurately identify an excerpt that alludes to the central idea that experiencing diversity leads to greater tolerance, I would need specific excerpts or passages from the text you are referring to. However, a typical excerpt might express themes such as the value of engaging with diverse perspectives, personal growth through understanding different identities, or the importance of inclusivity in fostering a supportive community.
If you provide the excerpts, I can help you analyze them and point out which one best represents that central idea.