The Equalizer is not a comic book. It originated as a concept for film and television, and doesn't have a comic book counterpart. However, it might have inspired comic-like adaptations or related merchandise, but the core entity is not a comic book itself.
Well, in the back story of 'The Equalizer 2', it's probably about how the main character has this strong moral code that developed over time. Maybe he witnessed a lot of injustice in his early days, like in his neighborhood or during his travels. His past relationships, both good and bad, could also be part of the back story. It all comes together to make him the person who is so determined to right the wrongs in the movie.
The back story of The Equalizer often involves a character with a troubled past, perhaps involving injustice or trauma, that drives them to seek justice and balance in their own way.
Definitely not a true story. 'The Equalizer' is a work of imagination, crafted by the writers and filmmakers to entertain audiences with an action-packed narrative that doesn't draw from real events.