Elon Musk, billionaire adviser to President Donald Trump, leaned into the accusations that his Monday salute was a “Sieg heil” gesture with a series of trollish Nazi puns on X. “Don’t say Hess to Nazi accusations!” Musk wrote Thursday, referring to German Nazi Party leader Adolf Hitler’s deputy, Rudolf Hess.

Elon Musk has seemingly done the unthinkable and shown his knowledge of Nazi history is far deeper than the ADL would like the public to believe.