This is nothing more than typical white supremacist myth making.  Fact is Indigenous people flourished on this continent for thousands and thousands of years.  The oldest archaelogial evidence indicating a village settlement 14,000 BC They were millions strong in numbers, healthy and thriving before Columbus took a wrong turn and "discovered" their land. It was Europeans who were travelling the world enslaving, raping, torturing and murdering people of color.  But facts don't matter to your lot; you'll say anything to try and justify the massive theft of land and the ongoing colonization.