In All My Sons, Ann says : "father or no father, there's only one way to look at him." What does she mean?
What Ann is saying here is that her father is a criminal.
"Ann expresses concern that the memory of her father’s trial and conviction might still be fresh in her old neighborhood."
"She is ashamed of her father, whom she imagines could be culpable for the deaths of many young soldiers, possibly even Larry. Joe, on the other hand, defends his former business partner and rationalizes the crime Steve was convicted of: the shipment of “cracked cylinder heads” destined for U.S. Air Force planes during the war. This line of reasoning, uncomfortable to Ann, ends with the sudden decision to dine out for the evening."
Ann is disowning her own father because he has been involved in the deaths of pilots by producing the faulty cylinder heads. She believes him to be guilty and despite the fact that he is her father, she can now only see him as a guilty man responsible for the deaths of those pilots. She refuses to feel for him or look at him as her father. Pity is not an option for her.