what are 2 differences between The American Yawp (TAY) on the arrival of Columbus and…

what are 2 differences between The American Yawp (TAY) on the arrival of Columbus and Howard Zinn, A People’s History of the United States, Chapter 1: “Columbus, The Indians, and Human Progress.”  and why they would write differently about Columbus
http://www.historyisaweapon.com/defcon1/zinncol1.html

1. Indigenous America