The Indians were not Jews lined up for slaughter. Many of the tribes were warrior by nature. I've visited many colonial houses in Massachusetts with their “safe houses.”
The Deerfield Massacre in the early 1600s showed they had fight in them; they just didn’t have the numbers. They played an active role before and throughout the Revolution (I’ve seen the site of the massacre at Ellenville NY where they joined with Tories); afterwards it was just a slow push westward for them...