The government is untrustworthy for making such decisions, has corrupt motivations and is very frequently completely wrong, and typically implements such penalties with unnecessarily cruel, ineffective and sadistic methods.
On the other hand, becoming so homicidally angry at capitalist robber-barons that you feel compelled to take lethal action against them is a perfectly justified and almost universally understandable situation that anyone who lives in said capitalist system has probably already fantasized about on occasion.