A female customer finally emerges to tell him to back off, and gets called a "f--king bitch" for her troubles.
The security guard then tells a colleague over the radio that she was about to call the police, but the maelstrom seems to have passed.
City Manager Jimmy Morales told the Miami Herald the incident was just one example of what staff face while trying to keep the public safe from themselves.
"Four-letter words, heated comments and city staff being mocked were common this past week in South Pointe Park," he said.
"While the Publix incident was one of the most adverse encounters with a member from our Code staff, several Park Rangers have recounted many less than cordial exchanges when asking members of the public to wear a face covering at a public park or adhere to social distancing."
Miami Beach's Code Compliance Director Hernan Cardeno agreed: "Our inspections for facial coverings and social distancing aren't always welcomed, but we are doing this for the greater good.
"I'm proud to lead a team of Code Compliance professionals who are on the frontlines every day in our community simply trying to ensure the public complies with the safety measures in place during this global pandemic."