In the film El Verdugo (The Executioner), a family struggles for housing. The alternatives are either being an executioner or not having a decent place to live. According to the scenes of the film, the conversations among the characters, and the reactions of the protagonist, Jose Luis: Do you think that he is really convinced about his new duty? Or it is the social and family pressure that compels him to do so? On his own, -no wife or father-in-law- would he have acted differently? Is this fear, or opportunism.. ?

For your post, remember the definition of a "Mitläufer" during the nazi era:  one who is not convinced by the ideology of the group followed but merely offers no resistance, such as for lack of courage or for opportunism.  

How this relates to the Spanish political situation at that time? 

Find evidence in the film to support your thesis.