The true story of Christopher Columbus has very little in common with the myth we all learned in school.
Columbus Day, was invented by the Knights of Columbus, a Catholic fraternal service organization. Back in the 1930s, they were looking for a Catholic hero as a role-model their kids could look up to. In 1934, as a result of lobbying by the Knights of Columbus, Congress and President Franklin Roosevelt signed Columbus Day into law.
Before 1492, the population on the island of Hispaniola probably numbered above 3 million. Within 20 years of Spanish arrival, it was reduced to only 60,000. Within 50 years, not a single original native inhabitant could be found.