Final answer:
Colonists opposed Berkeley's plan to build forts as it was defensively focused, incurred higher taxes, and didn't align with their desire for an offensive strategy against Indian raids. Instead, they supported Bacon's Rebellion which promised a more direct approach.
Step-by-step explanation:
The colonists were opposed to Governor William Berkeley's plan to build forts along the Fall Line because they felt it did not adequately protect them from Indian raids. The plan was seen as too defensive, and it involved increased taxes to fund the construction of nine new forts. This approach contrasted with the frontier residents' preference for an offensive strategy to directly address the perceived threat. Furthermore, they found in Nathaniel Bacon a leader who supported a more confrontational stance against the Indians, potentially due to desires for land and a dislike of Berkeley's governance.
Berkeley's refusal to grant a commission to Bacon to lead forces against the Indians and his defensive strategy were a source of conflict, culminating in Bacon's Rebellion.