How does the author of john white and Roanoke develop the idea that establishing a colony was going to be difficult?

In the passages, the author gives a few details that develop the idea that establishing a colony at Roanoke was going to be difficult because of the Native Americans. The author says, "not all relations between the colonists and the Native Americans were friendly." He expands on this when he states, "some Native Americans were still angry about the colonists' presence and threatened to do battle." The Native Americans who did not want the English colony at Roanoke made it difficult to establish a colony.