With a little bit of logic...
I've been waiting to see if someone else reaches this conclusion. Far as I can tell, they haven't, so it needs to be said. It seems blazingly obvious to me.
TSA's internal stings are able to get weapons and explosives on the plane 95% of the time.
If "terrorists" existed, or more precisely if "terrorists" were actually a serious enemy, the "terrorists" would be making similar tests with non-simulated explosives. Since 95% of those tests would succeed, we'd have a WHOLE FUCKING BUNCH of exploded planes.
We do not have any exploded planes. Not one.
Therefore "terrorists" are not a serious enemy.
We do have a problem with non-"terrorist" moles like Lubitz, a Kraut with no "terrorist" connections. Using only an overblown manic sense of humorless Kraut self-importance, he crashed a plane after carefully going through all the stages to become a certified pilot. We may have a similar event in the Malaysian plane that went down near Australia, but we'll probably never know.