Someone coming to the conclusion that the warlord was selfless and merciful by giving the people the opportunity to be saved does not, IMO, portray an "evil" being. Likewise, leaving behind those who did not choose the salvation offered, could lead one to believe that the warlord was just and that the people who did not go chose their own doom.
may i differ .. the warlord would only be selfless and merciful by the people the opportunity to be saved IF they where under no obligation to him for being saved , and under no pressure due to the famine ....WHY was no offer made in the years before famine , why wait till the choice is so stark .??
if the warlord was good and selfless then he would save all , with no demand of allegiance .. he would save all .. then worry if they where of value .
this story more show and directs us to the problems with the bible and the differing views of god it recounts ... the classic question does god meet my moral and ethical standards ??? some of the time all of the time any of the time