Is this German neo-Nazi party poster referencing the Holocaust?

(click ad) There's a state election in Berlin next month. These posters for the far-right NPD Party, featuring party leader Udo Voigt, translate to: "Step on the gas!" A gas chamber joke? Other party leaders think so. Udo says nein. Look at that grandfatherly face, he would never lie. Hey, Hitler is still moving product. Previously: How to get neo-Nazis to read an anti-neo-Nazi message.