BBC World Service, and basically every other news organization that has asked Gibraltar residents how they feel about Brexit. The fact that you are confident that Spain would never reassert sovereignty over the rock does not mean that Gibraltar residents are equally as confident. If you re unaware of this then I think that you’re the one getting your news from parallel Earth.
Excuse me, but I never mentioned “armed”. It is interesting that this seems to be a possibility on your mind.
If you want Gibraltar residents to stop fearing Spain, (a) tell your foreign ministers to shut the fuck up about Gibraltar (here’s your current onestirring the pot), (b) stop unfurling Spanish flags there, and (c) stop making fun of them for worrying about this.