Question

How does the incident with Lula show that prejudice in the South was not just from whites toward black Americans? in to kill a mocking bird,

Answer 1

Lula showed prejudice by castigating Calpurnia for bringing Jem and Scout, who were two white children she cared for, to an African-American church. If the two children were African-American, she would have treated them differently, which is the definition of prejudice.