So what if they're idiots?
I can sympathise with the general thrust of the article, but so what if they're too stupid to make a bomb? The point is people keep trying to do this, quite regularly if you believe the number of security operations going on around the country. The poing all of you have missed is that they are trying to kill people, and one of these days they'll manage it purely on the odds. The people behing the july bombings were competent enough and there are a lot more people out there, equally competent, who are simply waiting to make their move.
I agree that a lot of the security precautions taken by this country are unnecessary, for example the liquids one (though, really, any explosion on board a plane, no matter how small or how incompetently produced, is going to be dangerous because of the dynamics involved) and other things that are really an attempt by the current government to tighten its grip over our lives, but I can remember the precautions taken during the IRA's tenure as well. For a while a lot of cities removed all their litter bins in order to prevent the IRA using them to hide bombs.
They started out as incompetents as well.
Whatever our government is doing, the truth remains that these people want us dead, and they want it because we aren't muslim, because we don't worship their version of god and don't venerate his prophet.