Sure! I get it.
I get it too, to some extent. I mean, how are we supposed to accomplish this? Fine, so we ban all flights to the US from West Africa. There ARE NO flights from West Africa to the US. This guy came through Brussels. So do we ban flights from Brussels or does the whole world ban ANY flight from West Africa???
That’s what it would take. How can you accomplish that? What if the guy flew to Russia and then went to Germany and then to the US? It’s impossible to track.
I don’t know what the answer is and before I really started thinking about it - I shared your sentiment, but it doesn’t seem very realistic to implement.