The situation in America in the eighteenth century was tense. On the one hand there were benefits from the British holding sway in the colonies, on the other, residents wanted the same rights as were held by the British. There was always fear that the Indians would attack and overrule the country.
The loyalists were not so bothered about the then king of Britain, George III, but did appreciate the protection their loyalty brought in the military attacks on the Indians. The French came into the conflict on the side of the colonists making it an international rather than a civil war. The outcome, American independence, was only won after years of conflict.