There’s a clear point where Fat Tony goes off the rails: depending on your view, it’s either right at the start (if you believe it’s not right to steal bread to feed your starving family) or at the point where he spontaneously switches from bread to cigarettes.
I’m curious which part of my comment you think plays that role.
It was just a joke, but note that an analogy can die by a thousand cuts. Fat Tony's argument is extremely weak at every step (family => "large family", bread => cigarettes, give => sell).
Reminded me of this exchange:
Bart: Uh, say, are you guys crooks?
Fat Tony: Bart, um, is it wrong to steal a loaf of bread to feed your starving family?
Bart: No.
Tony: Well, suppose you got a large starving family. Is it wrong to steal a truckload of bread to feed them?
Bart: Uh uh.
Tony: And, what if your family don't like bread? They like... cigarettes?
Bart: I guess that's okay.
Tony: Now, what if instead of giving them away, you sold them at a price that was practically giving them away. Would that be a crime, Bart?
Bart: Hell, no!