When everyone agrees with Dr. Iannis to go to church, it reinforces that arguing about politics is the way that these men connect with each other. Underneath the gruff and argumentative exteriors, the men genuinely care for each other and for their country, no matter how it's governed. Similarly, Mandras's desire to not marry Pelagia yet as to not leave a widow shows that at this point, he recognizes her as a person and is willing to prioritize her future over his own desires.