The scenario told in this film depicts a situation in which we frequently disregard the feelings and situations of others around us, people who may not have the same advantages as us. We can sense the psychological upheaval that Joker is experiencing from his point of view. All disappointment and rage build up and eventually explode. The people of Gotham rebelled as a result of their dissatisfaction and indignation at the injustice they faced.
The Joker is also seen dancing on a car in the midst of the rioting, surrounded by people shouting his name. Making them an embodiment of "Hero" in order for them to share their ideas.
Read more for Indonesian review in http://www.alunauwie.com/2020/07/joker-all-i-have-are-negative-thoughts.html