Should Columbus Day Be Obsereved?

This debate has been argued for quite some time now. Looking back at history, as much as 517 years ago, Christopher Columbus might have been indeed, the first European to set foot on the continent, but was he alone or where there others here before him. It all started on a voyage back in the early 1490s when many people still felt the world was flat, and if you sailed far enough into the sea, one can fall off the edge, failing to their doom, so Columbus along with his sailors took sail in 1492 on the Pinta and the Nina to test theory, that the world was indeed round and there is a shorter route to India, Spain and Japan, if you sailed westwards. King Ferdinand and Queen Isabella supported his plans, while others were scared and skeptical that the journey would not be completed. So in 1492 Columbus set sailed and reached San Salvador on October 12, 1492. When he first arrived he called the local people Indians, believing he was in India, he made numerous trips back and fourth from the Caribbean back to Spain. During his eight year voyage, Christopher Columbus was issued to go back and find gold and riches by the King and Queen. He did in fact find some, but it didn't cover the devastation he brought to the people of countries. His people brought diseases such as small pox, yellow fever, measles, and etc. The natives of the countries were either slaves or mistreated unfairly. Columbus did indeed accomplished his goals, but did he did it in a dignify way. In conclusion, I want to hear your thoughts and feedback, Should Columbus Day be observed?