Chaplain Tappman, a significant character in the original novel, was canonically depicted as a white Protestant chaplain. In the 2019 series, the role is portrayed by Giancarlo Esposito, an African-American actor, constituting a race swap.

The film portrays Christianity primarily through Chaplain Tappman, a sympathetic character who genuinely struggles with his faith and the moral ambiguities of war. While the narrative critiques the ineffectiveness of institutions and the difficulty of maintaining faith amidst absurdity, it positions the audience to empathize with the chaplain's personal journey and does not condemn the faith itself.

The film explicitly condemns antisemitism through the portrayal of bigoted characters like Aarfy, whose prejudiced remarks are clearly presented as part of his overall moral depravity. The narrative frames such bigotry as wrong, positioning the audience to sympathize with the victims of prejudice.