In this scene Starr is contemplating whether or not she should speak up when people are unintentionally offending her at school. Starr realizes that she should speak up when something is bothering her because her voice is important.
What's the point of having a voice if you're gonna be silent in those moments you shouldn't be?
In a tv interview Starr gets to tell her story of the night Khalil was shot. The things she says in the interview are her way of fighting for Khalil's justice.
"If officer Cruise were sitting here," Mrs. Carey says, "what would you say to him?"
"I'd ask him if he wished he shot me too."
I turn to the cops. "I'm sick of this! Just like y'all think all of us are bad because of some people, we think the same about y'all. Until you give us a reason to think otherwise, we'll keep protesting."
In this scene Starr is protesting on the street. The quote expresses how Starr believes that people of her race are discriminated against and treated unfairly by police officers. People of Starr's race are all treated the same and assumed to be something they are not.