The irony of a "black" white boy
Macon isn't even technically a member of the majority. By leaning into his identity as a person of Jewish heritage, he could easily have realized that we're all in this together, and that the goal is to end inequality. In other words, his real identity would have been better suited for his passions, but instead, he chooses a fake identity, appropriating his limited understanding of black culture and becoming an offensive stereotype instead of a real, complex person.
The irony of an "angry" white boy
Macon isn't just angry. He's violent and terroristic. His radical approach to racial reconciliation is incredibly ironic given the fact that he is not black. So his anger must be some kind of misanthropy—not altruism.
The ironic desire for victimhood
For some reason, humans find a great deal of solace in the idea that they are the victims of injustice. That doesn't mean there aren't real victims, but Macon isn't one of them. His desire for victim status is driven by the misguided assumption that being the victim will bring him power and moral supremacy against others.
The irony of a solution that doesn't fix the problem
Instead of allowing black people to share their insights, Macon freewheels it in his activism and ends up solving a problem that is tangential at best—he certainly doesn't fix any real problems with his idea. Basically he just wants all the white people to say sorry for black people being poor, but he has no concept for the complexity of systemic inequality, and he has no motives that aren't secretly selfish in nature.
The irony of white guilt and "social justice"
Macon belongs to a class of people called "social justice warriors," or people who stake their identity on injustices so that they can feel morally superior. Ultimately this is the intent of the novel, to show that such attempts to "effect change" are secretly just attempts to rid oneself of guilt and acquire victim status. In other words, the loudest people are not always the most ethically motivated.
