What is it about injustice that people find so disgusting versus other offenses? It seems that injustice is a topic that just about anyone can get riled up about. Justice is one of the few qualities that is nearly universally seen as good and noble and true. People may have their own ideas of what is just, but justice as an ideal is highly regarded.
Our desire for justice is one of the core things that sets us apart from "lesser" beings. It's also one of our only ways of dealing with the randomness inherent in life. I wonder if either of those has anything to do why so many people consider the ideal of justice to be so sacred, and injustice to be so disgusting.
Or maybe people don't care as much about justice as I perceive.