Obviously, "Hare We Go" is promoting the myth of Christopher Columbus's life. In reality, it's unclear whether or not Columbus was really Italian (he may have been a Spanish Jew who converted to Christianity during the Inquisition); by the time that he set sail, most people on both sides of the Atlantic had already figured out that the Earth is round (Washington Irving made up the story about him proving it round); the story about the crew trying to mutiny mostly seems to be making those at the top look good - an attack on the working class, if you will; and Columbus couldn't have discovered America if there were already people there (never mind that he initiated 500 years of genocide against the Indians). "Lies My Teacher Told Me: Everything Your American History Textbook Got Wrong" tells the whole story.
Oh well, other than that, it's great to see Bugs Bunny's gags, as he accompanies Columbus as mascot on the trip across the ocean, and then discovers America. Another classic cartoon.