It’s a manga, it’s an anime, and it’s movies.
And it’s pure evil.
Afro Samurai is the story of a man who exacts revenge on everyone he meets, even those who have done him no harm. In one battle in the manga, he uses children - one of them crippled - as human shields. In the movie Resurrection, he uses a DJ as a human shield.
That’s just the tip of the iceberg. Afro Samurai is depicted as being badass, and, since he’s the protagonist, as being more good than his opponents - but I doubt that, since everyone is motivated by vengeance and he goes to no end in killing everyone in sight.
To reiterate, Afro Samurai is an evil work. Stay away from it, and keep others away from it too.