We need to revise our opinion of that loveable old prankster. Nowhere near as bad as Assad.
First off, genius, Spicer didn't speak of Hitler using gas on his own people. He made reference to Hitler not weaponizing gas or chemicals for warfare the way Assad did.
Your title ambiguity attempts to infer people know of Spicer's press conference the way Spicer assumed the people he was speaking to knew the holocaust was an aside per the chemical warfare discussion.
IOW, you equated Spicer's press conference with Hitler's attempted extermination of Jews.
But you're a democrat so you would be that math-challenged.