I'm not sure how and why a movie, in which [spoiler]the main character's strongest believe is not to kill people[/spoiler], could celebrate the killing of people so much.

While this movie did have some clear "the terror of war" scenes, the finale [spoiler]did exactly what I've come to expect of Hollywood movies, glorified the "good guys" (soldiers), their weapons, and their belief in killing the enemy to defend their values.[/spoiler]

I know that the movie is based on the accounts of the survivors, so I won't argue for inconsistencies. However, regarding if killing people is supposed to be right or wrong, the convictions and beliefs of the main character seem half-hearted to me. His past, as shown in the film, suggests [spoiler]his unwillingness to use a weapon is rooted more in a high sense of guilt over violent outburst against family members than his religious beliefs. Otherwise, I'd suggest he might have reacted more strongly to all the other people killing around him.[/spoiler]