Columbus Day?

I believe that Columbus Day should be recognized as a holiday. This is because without a man like Christopher Columbus, America may be very different. He shapped the outcome of America by conquering land. I believe that to call him a mass-murderer is very ignorant and irrational claim to make. In order for America to grow as a dominant country, men like Columbus needed to assort authority and make things happen. Without strong leaders like this, America would never have even started and turned into a power nation.