The show wanted to set up the murderer as a misunderstood victim.
In real life, some murderers have been things such as policemen, firefighters, doctors etc. Some had points to make or legitimate grievances, some saved more lives than they took, but once you willingly cross the line saying "hey, judge, I was made homeless by a policy, couldn't find a job, my aunt died" and the judge respond with "oh, you are the real victim here, hey, you guys he tried to stab, you need to do better!".
The modern world with the ideologies of today have demoralised people (such as the writers on TFWS) to the point that they can't see who is a bad guy in a situation