Final answer:
Banneker highlighted the irony of American colonists demanding freedom from British oppression while maintaining the system of slavery, thereby showing the contradictory nature of their stance on liberty.
Step-by-step explanation:
The comparisons that Banneker draws between the American colonies and slavery focus on the ironic and contradictory relationship between the ideals of freedom and liberty that fueled the American Revolution and the continued existence and justification of slavery. The colonists, who were revolting against perceived British tyranny and advocating for natural rights and freedoms, were themselves enslaving Africans and African Americans, depriving them of those same unalienable rights. Banneker, along with others, recognized the hypocrisy of colonists who characterized British policies as enslaving, likening their condition to that of black slaves, while continuing to uphold and benefit from the institution of slavery themselves.