Final answer:
The question incorrectly names Richard Hoggart as being angry about a mass attack. The provided texts do not directly reference Richard Hoggart, but they do include reactions of anger and frustration toward injustice, racial discrimination, and failure of protection by legal systems in various historical contexts.
Step-by-step explanation:
Understanding why Richard Hoggart was angry about the mass attack requires an examination of multiple historical instances of violence and the reactions of various individuals to it. Notably, none of the excerpts provided directly mention Richard Hoggart, which suggests the question might be misdirected or lacking context. However, exploring these instances, we see expressions of anger and frustration due to injustice, racial discrimination, and the failure of legal systems to provide protection or redress. For example, the reaction of Master Hugh to the brutal mistreatment of Frederick Douglass showcases anger over the abuse and the legal system's ineffectiveness, highlighting a broader societal anger against systemic failings and violence.