1. Roosevelt was bound to win the war.
The USA easily beat Japan, because Japan is a little country, and because the USA had far more aircraft carriers than the Japanese.
Germany was easy to beat because Germany was relatively small and weak compared to the combined size and might of the USA, Russia and the British Empire.
2. Churchill was bound to defeat Hitler.
Hitler had said he would "guarantee the British Empire" in return for a dominant role on the European continent.
Germans under attack in World War II
"Operation Sealion, the projected Nazi invasion of Britain, was never going to happen.
"1. The German Navy (Kriegsmarine) didn’t have any amphibious capabilities, and would have had to use Rhine river barges to transport tanks across the Channel.
"2. The Luftwaffe's fighters lacked the range to stay and fight over British territory for longer than a few minutes."
Did Hitler Deliberately Lose the War? - Subversify Magazine
It was just propaganda.
Rommel, who was forced to kill himself.
German equipment in World War II
Victims of the US and UK troops, who acted just like the Nazis.
3. Churchill WAS an appeaser.
Churchill, in 1932, considered forming an alliance with Hitler.
Churchill was in Munich in 1932 and there he met Ernst Hanfstaengl, who worked for Hitler.
Churchill said to Hanfstaengl, "How does your chief feel about an alliance between your country, France and England?"
Churchill and an alliance with Hitler