Theme: cruelty, what does Blanche say about cruelty? Who has been deliberately cruel in the play thus far?

The only unforgivable crime, according to Blanche, is deliberate cruelty. This sin is Stanley's specialty. His final assault against Blanche is a merciless attack against an already-beaten foe. Blanche, on the other hand, is dishonest but she never lies out of malice. Her cruelty is unintentional; often, she lies in a vain or misguided effort to please. Throughout the play, we see the full range of cruelty, from Blanche's well-intentioned deceits to Stella self-deceiving treachery to Stanley's deliberate and unchecked malice. In Williams' plays, there are many ways to hurt someone. And some are worse than others.