Sure, but just to add a bit to it there were multiple terror attacks on trains in Europe in recent years. In Germany there was this knife attack just a few months ago, as an example. You also run into some annoying folks on public transport from time to time even if they're not trying to kill you. In those pricey plane seats they're among themselves.
This is the best explanation I can come up with why they're doing it, there isn't really any advantage flying this route. It's not true that people choose the most ecological mode of transport as long as speed is equal or faster, they often have other priorities.
>In those pricey plane seats they're among themselves.
Train travel also has multiple classes of service. And in some ways it's easier to keep people in their own half on a long train than on an A319 where they're only separated by a few feet and a curtain.
So I guess I don't see your point here? Unless you're claiming that terrorists travel first class on trains but can't afford it on planes.
The advantage is you can fly from wherever your constituency is in the EU to Frankfurt and then connect on to Strasbourg, and do the same on the way home.
Frankly, wherever there are fast alternatives, I wonder if the days of airlines are numbered.
Push through rail opportunities like maybe more runs with smaller trains, better synchronization of schedules, quick connections, faster trains etc..