A mural portrait of deceased firefighter Muhammad Adib Mohd Kassim in Shah Alam has been vandalised.br br Fire and Rescue director-general Mohammad Hamdan Wahid, who called the incident 'irrational', said this wasn't the correct way to express dissatisfaction.br br He added that as citizens of a developing nation, Malaysians should act rationally.br br Adib, a member of the Emergency Medical Rescue Services (EMRS) unit at the Subang Jaya Fire and Rescue Station, died a few weeks after sustaining injuries during a riot outside the Sri Maha Mariamman temple in USJ 25, in November last year.