To be fair to Dante, he wrote the Comedies after the Civil War in Florence, so it was post war beef. Also the character of Dante is at his most petty and worst acting during Inferno, which is the entire point for his later revelations. Even then, Paradise explains that what he has seen isn't all real, instead its Heaven and Hell making themselves knowable to Dante in a way by Gods's own command. Neither Heaven or Hell or Purgatory are exactly like Dante saw, each level more or less exists simultaneously with one another. And Caeser isn't just in Limbo (1st layer of Hell), he has a full ass throne in Limbo.