Columbus isn't just offensive, it's bad history. Everyone knew the world was round, he never set foot in the Americas and the Norse had colonized Greenland and Newfoundland 500 years before.
Here I really just find it funny that David is offended my an individual's existence. Its as though he wishes the person did not exist, that the person's history did not exist. that , in my opinion, is the root problem with the anti-monument crowd. inappropriate wishful thinking.