"Float Like A Butterfly, Sting Like A War Crimes Tribunal"

Just last night, I received this rather bizarre missive via email (HitlerPuncher AT gmail DOT com):

Dear Sir:

Please find enclosed an item of great historical import for your blog. For reasons on which I can only speculate, forces within the German and American governments have actively conspired to hide the fact that a time-traveling Muhammad Ali once beat up Adolf Hitler, Joseph Goebbels, Heinrich Himmler, and Hermann Göring—with one punch! Why does Jesse Owens get all the credit for shaming the Third Reich? You would do the world a great service by promoting this proof, and maybe then we can all begin to sleep without that voice constantly telling us to burn things.

A Concerned Stanford Historian

Attached was the following photograph:

He may not have had no quarrel with them Viet Cong, but he sure didn't brook no backsass from the Third Reich.

Thank you to the mysterious Dr. Medulla, whose name does not appear on any faculty list that I can find at Stanford...