What is the tone of this paragraph?
I had hoped that the white moderate would understand that law and order exist for the purpose of establishing justice, and that when they fail to do this they become dangerously structured dams that block the flow of social progress … we who engage in nonviolent direct action are not the creators of tension. We merely bring to the surface the hidden tension that is already alive. We bring it out in the open where it can be seen and dealt with. Like a boil that can never be cured as long as it is covered up but must be opened with all its pus-flowing ugliness to the natural medicines of air and light, injustice must likewise be exposed, with all of the tension its exposing creates, to the light of human conscience and the air of national opinion before it can be cured.