Terminator: Katherine Brewster? Have you sustained injury?
Kate Brewster: Drop dead, you asshole!
Terminator: I am unable to comply.
Terminator: You are terminated.
Kate Brewster: How much did you take?
John Connor: Enough.
Kate Brewster: Well, this is the stuff we use to chemically neuter dogs.
John Connor: No, you shouldn't exist. We took out Cyberdyne over ten years ago. We stopped Judgment Day.
Terminator: You only postponed it. Judgment Day is inevitable.
John Connor: Tell her who I am.
Terminator: John Connor is the leader of the worldwide resistance and last hope for mankind.
Terminator: Your levity is good, it relieves tension and the fear of death.
John Connor: The T-X, can you find a way to destroy it?
Terminator: Unlikely. I'm an obsolete design.
Terminator: John Connor. It is time.
John Connor: Are you here to kill me?
Terminator: No. You must live.
Terminator: She'll be back.
Terminator: I'm back.
John Connor: Do you even remember me? Sarah Connor? Blowing up Cyberdyne? Hasta la vista, baby? Ring any bells?
Terminator: That was a different T-101.
John Connor: What, do you guys come off an assembly line or something?
Terminator: Exactly.
John Connor: Oh man, I'm gonna have to teach you everything all over again.
Kate Brewster: I hate machines.
Kate Brewster: Next time bring a clue, not a paintball gun.
Kate Brewster: Just die you bitch!
Answer: He didn't program the Terminator, she did - remember, John is dead, successfully eliminated by that very Terminator. As to why she didn't program the Terminator to obey both of them, that's an open question - possibly she needed to supply a voiceprint which obviously couldn't be obtained from the deceased John (which would also explain why the Terminator in T2 appeared to only be programmed to obey John, not both John and his mother). Alternatively, it's plausible that the Terminators can only be programmed to obey one individual, in order to prevent problems in the case of conflicting orders.
Tailkinker ★