ah, semantics. I can play this game.
your position is that a convenience store robber is just a robber when he only points the gun at the clerk and says 'give me the money', but becomes a terrorist the second he adds 'or i'll kill you'.
Am I stating your position correctly?
No, in both your senarios, the goal of the robber is to use force to grab money and run. He is not projecting threats of terror to third parties in an effort to obtain a goal, he is merely using force to grab money.
There is a clear difference, you are just pretending not to see it.