This is a meme, coming from an old copy/paste bit. Know your meme has a good write up about it.

Albert Einstein Copypasta, also known as “Malice of Absence,” is a fictional account of a philosophical debate on the benevolence of God between a religious-skeptic professor and a student of faith, the latter of whom is revealed to be the world-renowned scientist Albert Einstein. Online, the last line in the story is often referenced in discussion threads and comments to mock hyperbolic statements or tall tales.