Why was it a war between whites during the American Revolution? Aren't they all British?

At that time, the colonies in North America were British territory, mostly British immigrants, nominally British subjects; However, because the British government consumed the national treasury in the war with European countries, it could only increase taxes from the North American colonies to alleviate the emptiness of the national treasury of the British authorities, which caused great losses to the interests of the colonial people. In a series of protests in North American colonies, the relationship between British authorities and colonies became stiff, and the colonial war of independence broke out. So this is a war between white immigrants and the British.