Why is every body suppried maniac magee is allergic to pizza?

In "Maniac Magee," the character Jeffrey Lionel Magee, known as Maniac, is not actually allergic to Pizza. Instead, his aversion stems from a traumatic experience related to a pizza dinner he had with a family that ultimately highlights the racial divides and conflicts in his life. The pizza symbolizes more than just food; it represents his struggles with belonging and the complexities of his journey through different communities.