I don't think anyone is suggesting anything other than reform of how we prosecute laws in this country, there is an obvious imbalance at play here and cases like this highlight the problem.
Second.. sure, fuck that guy; but what about his family? His children? The community? Just because you put one person in jail does not mean that suffering and loss ends there.
What is the function of the justice system? To fulfill our base needs for revenge? Or is it a tool to improve society? If it's the latter, then "fuck that guy" is not a useful response.