He is the antagonist, but if we consider what everyone is fighting for, and the end outcome of their goals
He is the anti-hero trying to change things, by using extremist means, and the protagonist and his group the villains trying to perpetuate an unfair and predatory system, due to convenience, comformism, lack of vision, and a refusal to think, seek, and strive towards a different state of things
Neither of these groups can be called good guys, but the antagonist, at least, despite all his schemes and terrorism, is trying to make things better
And by showing his dream sequence/flashback, something that only he and us the readers can have access to, we can see where he is coming from
One of his core memories is about his dad fucking up an abusive father who refused to become a better person despite being given extensive help and opportunity, so now as an adult he too uses violence to enact change in order to help others
It is that sequence what let's us know how sincere he is about things