The most likely impact of seeing such an image on the American colonists would be: "By confirming the repressive actions of the British government, the engraving would increase the desire to rebel against it."
Images and engravings during this period often served to galvanize public sentiment and mobilize activism against perceived injustices. If the engraving depicted the British government acting repressively, it would likely resonate with the colonists' growing frustrations and grievances, leading to an increase in their desire for rebellion and resistance against British rule.