There is a qualitative difference between this sense of injustice and what
the Creature has felt earlier. Here, after doing a good deed, he has been
been judged undesirable in a preemptive manner and physically punished.
Thus, what festers mentally as well as physically is that a simple action
to save a life has been met with a violent, life-threatening reaction from
the larger society of human beings. He feels no longer merely rejected by
this world but actively menaced.