Elon Musk, the world's richest man and a close ally of President Donald Trump, has faced widespread accusations of making a Nazi gesture twice during a speech to a crowd of Trump supporters gathered at Washington's Capital One Arena for an indoor "Presidential Parade" on Monday, shortly after Trump's second inauguration.

An activist group projected a photo of billionaire Elon Musk making a controversial gesture that resembled a Roman salute on a Tesla factory near Berlin this week, with a single word above the world’s richest man: “Heil.

They projected the words “heil” and “boycott” alongside the large Tesla logo, as if to read “heil Tesla” or “boycott Tesla" on to the nine meter high building on Wednesday night