Earlier quoted context omitted.
They might think airport security personnel at Amsterdam or Paris do their job better than their colleagues from those 8 Middle Eastern and North African countries. And/or they might think Netherlands and France is just as attractive for the terrorists as the US, i.e. the terrorists won’t bother taking that second flight. BTW, I think Russia should be the 9-th country on that list, as they have long history of sponso…
I'm ignorant of Russia's historical role in sponsoring terrorism; I'm only getting recent Ukraine / Syria links. Can you share some resources to learn more about it?
Russians ordered bombings in Warsaw, Poland in 1920-s. Shipped weaponry to Irish Republican Army and Palestine in 70-s. Speaking about Palestine, some say Russians have invented plane hijacking as a terrorist tactic: http://web.archive.org/web/20130102051626/http://www.nationa...
Killed many political opponents abroad, Alexander Litvinenko in UK, Sulim Yamadaev in UAE, Stepan Bandera in Germany.
If you want more, read books and articles by Stanislav Lunev, Ion Mihai Pacepa, Viktor Suvorov. Those are high-ranking KGB officers who surrendered and were cooperative. Alexander Litvinenko also published stuff about state-sponsored terrorism in modern Russia, but he concentrated on domestic not international.