The point of terrorism isn't especially to kill "a lot of people" (although that helps, obviously); it is to terrify. Many recent terrorist attacks killed relatively few people, yet were extremely effective in terrorizing.
Should the first car of a TGV explode at 350+ km/h I think it would work as a terror attack.
Yet, although train security is nil, it never happens [0]. I'm not sure why. My first guess is there are not that many terrorists. We probably could ease the security on planes with few ill effects.
[0] There has been train attacks or hijacks but no bombs AFAIK.
It's not nil. I had to get my luggage x-rayed when I went from Barcelona to Madrid, a national trip.
I didn't get checked for metal objects etc, but there is no point. You can't get to the cab from the train anyway. And the impact of knifings/shootings is the same as in a busy shopping centre. We don't do metal detections there on every visitor.
So the main terrorism risk really relevant to it being a mode of transport rather than any other crowded place, is bombing and thus derailment of the entire train. And that is something that is checked for, at least here in Spain.
It is not checked in France, ever, at all, and TFA is about French TGV.
It is true that it is "checked" in Spain; I experienced it this summer while going from Sevilla to Cordoba. However the check is (in my experience) quite superficial; also, as it creates long lines of people that get upset that they may miss their train, it is expedited and many things do not in fact pass through the X-ray machine. And finally, it is not checked on all trains; we were checked from Sevilla to Cordoba (the train was going all the way up to Barcelona) but there were no checks on the return leg.
So, while it would be trivial to bring bad things aboard a train in France, it seems that it wouldn't be difficult in Spain either.
Should the first car of a TGV explode at 350+ km/h I think it would work as a terror attack.
Yet, although train security is nil, it never happens [0]. I'm not sure why. My first guess is there are not that many terrorists. We probably could ease the security on planes with few ill effects.
[0] There has been train attacks or hijacks but no bombs AFAIK.