The narrator of "By Any Other Name" doesn't feel too concerned about what happened because she feels it happened to Cynthia a different girl
Explanation:
"By Any Other Name" is the story of two Indian girls that are treated differently from their classmates just because of their origins, they are told to be cheaters just because of being from India, and even their names are changed to make them more pleasant and easy to understand to the Anglo students, the youngest sister does not really connect with her "new" name and that's what it says that all those offenses didn't happen to her but to another girl with a different name.
The overall tone of the passage "Caius Julius Caesar, the first Roman that came into Britain" is that, Julius Caesar was proud and felt like he could conquer Britain and take it for his own. Hope this answers your question. Have a great day ahead!