Originally posted by Gadiantor
You don't decrease the value of the target, you increase the cost of attacking it. You make it more difficult and therefore more costly to attack the target. Killing those responsible for the attack definitely increase the potential cost of future attacks, so that could be considered part of the strategy.
Thank for you for further explaining your position. I agree with your position as elaborated upon.

Anyway, back on topic, I still do not see this move as demonstrative of a lack of trust in Canada. I do not think anyone in Canada should see it thusly.

It is just an attempt at securing our border (especially since Canada is exceptionally lax about entry to their country).

When analyzing it in light of similarly pointless airline security measures, it does not seem like it will accomplish much.