Why did the british think they were right in the revolutionary war?

Because the British have a historical background of military service and lineage, units with great military records and high esprit. Their training standards had always been set at a high level and their professional officers had served with distinction for their Monarch, their Country and their Regiment. US Officers they encountered were ninety day wonders and the troops were hillbillies, farm boys, and semi-lliterate draftees from American slums. Americans had no sense of History and culture. The Brits were correct, but these men could fight.