Overthinking it maybe, but possibly in the other sense that the objective was merely
a) to reignite media attention to "the big bad guys hiding in caves"
b) cause disruption & delay (whether to travel of passengers or in this case cargo)
Only a few weeks til Christmas, when millions of extra packages enter the system. Wouldn't it be sad for all those kiddies if because of extra security implemented, ther presents were late and get there in January.
Ok so maybe I'm being a bit sarcastic but you get my point. Death & injury aren't the only desired results of "terrorism".
And I wonder yoo if the only point of this was to further complicate the inconvenience of air travel by a knock-on effect from altered security screening. It was cargo aircraft but look how the TSA now has "new" procedures... in AIRPORTS.