Characters
Two kinds of people are staying on this beach: the dead, and those that are going to die!
— Brig. General Norman Coda ‧ The Longest Day

Behind the line May contain spoilers.
Our reading
An editorial interpretation.
The speaker divides those remaining on the beach into the dead and those about to die. The absolute wording makes staying sound fatal and gives the statement the force of an urgent warning. It presses listeners to act without offering reassurance about the danger around them.
Context reviewed