Churchill most likely began his speech by discussing Britain's recent battle loss because he wants to show he is knowledgeable and trustworthy. Furthermore, he wants to address citizens immediate concerns.
Sir Winston Leonard Spencer-Churchill was a British politician, army officer, and writer. He served as Prime Minister of the United Kingdom from 1940 to 1945, when he led Britain to victory in the Second World War, and again from 1951 to 1955.
The perspective of speaker discussed here is racism. The injustice done to the whites is described in the excerpt. It makes the speaker angry because of this discrimination due to color of the skin.