It's wrong to think your parents are stealing from you.
Sal is missing money in his room, and he suspects that his parents might know where it is.
Sal wants to ask his parents about his money.
Sal asks his parents if anyone else happened to come in his room.
Sal asks his parents which one of them took his money from his room.
Sal's parents know that he doesn't think they did it and get to tell him what they know.
Sal's parents feel disrespected and feel obligated to defend themselves.