Amid widespread outrage after his Sieg Heil salute at President Donald Trump's inauguration party, Elon Musk doubled down by dabbling in some Nazi-themed "humor" on X.

The "Sieg Heil" heard 'round the world has made its way to Germany, where activists are using that now-infamous image at Tesla's Gigafactory.

Speaking at a celebratory rally in Washington, Mr. Musk twice extended his arm out with his palm facing down, drawing comparisons to the Nazi salute.

The incident lasted only seconds, but it sparked what has become a global debate about how to interpret what Musk did. Then Musk started posting Nazi-themed jokes.

Israeli Prime Minister Benjamin Netanyahu rushed to Elon Musk’s defense Thursday, claiming that the billionaire’s disturbing inauguration gesture —which millions of people around the world recognized as the Sieg Heil salute used by Adolf Hitler’s Nazi Party—was little more than a misunderstanding.

At a post-inauguration rally Monday, Elon Musk thanked Donald Trump’s supporters with a gesture that resembled a Roman salute, first putting his palm to his chest and then extending a stiff right arm toward the crowd, at a slight elevation and with his palm down. It wasn’t a one-off. He later repeated the gesture.

WASHINGTON (Reuters) -Billionaire Elon Musk's hand gesture while he spoke during a celebration of President Donald Trump's inauguration drew online comparisons to a Nazi salute on Monday, but a leading tracker of antisemitism said it appeared to represent a moment of enthusiasm instead.

Elon Musk has angered the Jewish community with what appeared to be a 'Nazi salute'. Does he have ties to the religion?

As the backlash against Elon Musk continues after the Tesla CEO made a straight-arm, Nazi-like gesture during his speech Monday at U.S. President Donald Trump’s inauguration, the billionaire posted a series of Nazi-related puns on X Thursday to his more than 210 million followers.

Elon Musk decided it would be a fun idea to hop on the social-media site he purchased and rattle off a few Nazi puns. Predictably, it didn't go well.

We can’t have a functioning democracy if we think our opponents are evil.