In fact the nature of the article is stamped by a quote from that paper, which far from showing how the British behaved, accurately describes the appalling depths to which the Mau Mau fell, especially in the treatment of their own.
It was war in Kenya against a ruthless enemy who had certainly never heard of what are quaintly called the rules of war.
When one captured these monsters one was not too choosy about their treatment.
This was accepted by both sides if not by ill-informed outside observers, who, alas always think that they know best. Yours etc