Tesla and SpaceX CEO Elon Musk believes the time has come to split Amazon, CNBC reported.

“This is insane @JeffBezos,” Musk said, tagging the Amazon CEO. “Time to break up Amazon. Monopolies are wrong!”

His tweet came after after Alex Berenson published a screenshot that his future book on COVID-19 did not meet Amazon’s selling recommendations. Berenson criticised quarantine and suggested that the risks of serious illness or death are much lower than reported. Amazon later said the book was deleted by mistake.

Musk was an active critic of government policies during the COVID-19 pandemic. He spoke out in favor of opening the country and stated that the instructions to stay at home were fascist.