I think he was being charitable. Not wanting to offend anyone. He ended like this

So for British teachers wondering how to teach the subject, it is important to cite various perspectives, including, crucially, the perspectives of the colonised; not in a wholly arbitrary manner seeking to buttress this or that grand narrative, but in a way revealing the complexities and contradictions of Britain’s colonial encounter with Africa.

which suggests he doesn't agree with their views. I think he is pretty neutral.