Lot's of people here know that who is Kanye West but have no idea who was Colbert and what he did
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In addition a lot of historical persons are a bit controversial. E.g. Julius Caesar was a great military leader, a reformist and a notable author, a hero for Rome. But his troops killed about 1 million and enslaved an other million ppl in Gaul, (around 50 BC the world population was something like 200 million, so two million was a really huge lot of people). He also ruthlessly suppressed his opposition at home, and had an extensive cult of personality. For such "exploits" nowadays he would be labelled as one of the worst villains in human history, something like Hitler or Stalin.