The whistle symbolizes forgiveness.
They demonstrated that if a government does not fulfill citizen`s expectations and it`s considered to be unsatisfactory, citizens have the right, the obligation and also the power to change this form of government in order to be sure that their rights are protected.
I believe it is C. Bradford believed it was the divine duty of the European colonists to populate the New World.
<em />
<em />
<em>Hope this helps! </em>