Is this morally defensible? Protesters claiming to support French farmers have targeted the Mona Lisa. Many consider it a shameful act of vandalism and a publicity stunt too far.
World’s most valuable artwork covered in soup

Glossary
Louvre - A famous art museum in Paris, France.
Leonardo da Vinci - An Italian artist and inventor (1452 - 1519), considered to be one of the world's greatest geniuses. He painted the Mona Lisa and designed an early flying machine.
Irony - A situation in which the result is opposite to what you might expect.
Van Gogh - A Dutch Post-Impressionist painter who is among the most famous and influential figures in the history of Western art.