Their motivation was to travel in a large group, with no security what so ever, into a remote area full of hating and armed people.
Now they are all dead instead of treating sick people.
Their dreaminess is now their families nightmare.
My bias is to see highly skilled doctors treat the sick, nothing more.
These heroic missionaries - and by the way they WERE highly skilled - are doing first and foremost the Lord's work. Obviously you disapprove. That is your prerogative. But the most significant work for the poor everywhere in the world is done by Christian missionaries not by Govt. drones.