Billionaire Elon Musk's hand gesture while he spoke during a celebration of U.S. 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.

There is debate about what gesture the tech billionaire meant to make at the Capital arena on Monday. Here's what people are saying.

Radio host James O'Brien criticized Elon Musk's controversial rally gesture, likened by some to a Nazi salute.