“Only an idiot would say a cop is scarier than a criminal.”
When facing a criminal, you’re facing only their bad intent and capacity to potentially inflict harm. So be it.
When facing a cop, you’re facing, ultimately, the full power and intent of the entire United States law enforcement apparatus and legal system. Just effectively resist/refuse to comply and watch the escalation proceed ultimately to the federal/military level. Refuse even the most corrupt, unlawful, dangerous or stupid command from a cop and your life is over.
Which one scares you more? You may be more scared of the former, but these days I'm definitely more concerned with the latter.