- Supported the use of the Black and Tans in Ireland
- Supported the use of concentration camps in South Africa
- Lobbied for the use of poison gas to put down a Kurdish rebellion (unsuccessfully)
- In 1902, Churchill stated that the "great barbaric nations" would "menace civilised nations", and that "The Aryan stock is bound to triumph".
- Wartime Government policies led to the 1943 Bengal famine, in which 3 million died, and he refused aid to be sent to the area. It would accomplish nothing, as Indians "bred like rabbits"
- In 1954, on the Chinese: "I hate people with slit eyes and pigtails. I don't like the look of them or the smell of them – but I suppose it does no great harm to have a look at them"
- In 1955, Churchill expressed his support for the slogan "Keep England White" with regards to immigration from the West Indies.
And yes, you are right that without his leadership, Britain would not have continued the war. His ruthlessness also led him to direct British troops and the navy to fight the French, giving a signal to the Americans that Britain would fight no matter what.