All this discussion seems to be derived from the idea that there is a state called safe. It does not exist and never has.
Natural phenomena wipe out cities and communities; volcanoes, tsunamis, cyclones etc.
Man-made destruction is merely more creative. Has everyone forgotten Bhopal?
Missiles, bricks, rockets whatever can be aimed at an aircraft and possibly bring it down. What about a well aimed Piper warrior? There is no ultimate defence, it doesn't exist. I bet the BN & ML guys are nervous, all that infrastructure in one building with no duplication.
The difference between a freedom fighter and a terrorist is politics.