Emmanuel realizes the source is not neutral. What is the tone of the excerpt?

On March 25, 1911, a preventable fire killed 146 helpless workers in New York City’s Triangle Shirtwaist Factory. The factory’s criminally irresponsible owners had refused to take even the simplest steps toward creating a safe workplace. The worst offense, however, was that the greedy owners had locked the door to the stairs to prevent employees from taking breaks and from stealing supplies.