Why would the powhatan people the jamestown colonists?

At the time English colonists arrived in Spring 1607, coastal Virginia, that was still home to the Powhatan Indians. The Powhatans participated in an extensive trade network with Indian groups within and outside the chiefdom. With the English, the Powhatan people were able to trade foodstuffs and furs, in exchange for metal tools, European copper, European glass beads, and other trinkets. 

The second , larger puritan colony of massachusetts bay was conceived as a "city upon a hill". but it also struggled with internal turmoil like the salem witch trials and external conflicts like king philip's (metacom's) war.