He’s right that the Americans wanted to genocide the indigenous people west of the Appalachians and take their land, and that was a big reason why they declared independence because the British wouldn’t let them.

He’s wrong that the British were restricting expansion out of morals and preserving the land for the indigenous peoples. It was just for the British, that maintaining a military presence in the Ohio Valley was much more expensive than the economic benefits they would get. If the numbers worked out a little differently they would have been just as eager to genocide as the Americans.