Most people are reluctant to kill, until they have to to live and protect those they love.
Cognitive dissonance prevents people from believing, that there really are those who fully intend to harm or even kill them, for whatever reasons.
They freeze, clinging to their preferred reality, and denying the real reality confronting them.
By the time people are shocked out of their frozen reality, it may be too late to resist.
They are imprisoned in physical or psychological prisons, the gates are closed and locked.
Those inside and outside the prison walls are both imprisoned by fear.
Westerners have been warned again and again for a long time.
Nah we are free people - we cannot be imprisoned.
So be it.