How did the police in Birmingham attempt to intimidate protestors?

In Birmingham, police sought to intimidate protestors by employing aggressive tactics such as the heavy presence of officers, including riot gear, and conducting stop-and-search operations. These actions aimed to instill fear and discourage participation in demonstrations by showcasing a readiness to confront dissent. Additionally, the use of surveillance and the threat of legal consequences further contributed to a climate of intimidation among protestors.