Terrorists ahead of elderly Americans

That depends on the timeline of His ministry.
What will Jesus do is also as appropriate to ask.
He is not here in the flesh now, and He did not generally prevent people from being killed when he was.
Infact he uses people's deaths to teach some truths.
The women caught in adultery maybe only exception I can recall for the moment.

 

Maybe rightfully separate the sheep from the goats...

 

Read Luke 19 for what will Jesus do.

11 Now as they heard these things, He spoke another parable, because He was near Jerusalem and because they thought the kingdom of God would appear immediately.

12 Therefore He said: “A certain nobleman went into a far country to receive for himself a kingdom and to return.
13 So he called ten of his servants, delivered to them ten minas, and said to them, ‘Do business till I come.’

14 But his citizens hated him, and sent a delegation after him, saying, ‘We will not have this man to reign over us.’

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24 “And he said to those who stood by, ‘Take the mina from him, and give it to him who has ten minas.’ 25 (But they said to him, ‘Master, he has ten minas.’) 26 ‘For I say to you, that to everyone who has will be given; and from him who does not have, even what he has will be taken away from him.

27 But bring here those enemies of mine, who did not want me to reign over them, and slay them before me.’ ”