To expand on the other post, Churchill wanted to re-arm the Germans and invade the Soviet Union immediately after WWII, with help from Italy, the US, and France. After Hiroshima and Nagasaki, he insisted invading using nuclear weapons while the Soviets were still recovering.

This is what got him removed from office. People were tired of war after two decades of world wars and Churchill wanted to go start a third one. It was called “unthinkable” for a reason. Even against nukes, the Soviets likely wouldn’t throw their hands up. They still had a large, experienced military with tons of fortifications.

His reputation has since been whitewashed, especially his support for fascism. Brits and liberals overseas look at him with nostalgia as a great leader, ignoring his politics before and after the war.