Really wierd bunch, i felt kind of sorry for his son when they were talking about how his dad slept with his wife, he didn't look like he was ok with it, also at the end when he said he was dissapointed with the events of 31st.
Few things here and there that made me think that he knows deep down that something isn't right but is very dedicated to his father, for right or wrong reasons.
The kids and women however were totally brainwashed, but the son i think just was scared of the outside world and was trying to convince himself that it was all ok.