Lisa, December 7 is not known for entering the ETO and defeating Germany, at least for Americans. It’s known for the surprise attack on Pearl Harbor and our declaration of war on Japan. Learn your history.
In a roundabout way you can tie December 7 to Germany but that’s not what first comes to mind for Americans, that’s why I was confused by your thread title and replied as I did.
And tho most Americans believed in isolationism during those years, you have no idea what Roosevelt would have done at the time regarding the war in Europe. Nice try on rewriting history, though.