Hong Kong’s deputy chief of police, Chris Tang Ping-keung, is expected to take command of the 31,000-strong force on November 19, at a time of unprecedented social unrest and deepening public mistrust of law enforcement.The Junior Police Officers’ Association (JPOA), which represents 80 per cent of the force, has urged Tang to make pushing for a law against insulting public officers his first priority.“We should be protected from being humiliated while on duty,” association chairman Lam Chi-wai…