Captain Torres speaks of what he does to the rebels as if it is normal and simple for him. The barber thinks of him as brutal. However, just before he leaves, the captain gives the barber a piece of advice. He says,

They told me that you'd kill me. I came to find out. But killing isn't easy. You can take my word for it.

It seems that the captain has understood the barber's difficulty and indecision. However, his words also reveal that perhaps committing atrocities against the rebels isn't as easy on him as the barber thinks. He's a cruel and brutal man, but clearly his actions take some toll on him. The killing he carries out isn't easy—and that revelation gives more depth to his character than there would be without his final warning.