The crowd are almost exclusively representative of a certain demographic. Let's call them demographic Z.
Demographic Z - Buys Heat religiously. Believes that you can never be brown enough or have big enough eyebrows. Considers TOWIE to be the zenith and Question Time the nadir of the televisual experience. Has no time for nuance or subletly (actually doesn't know what either word means, as has never heard of it). Will only be made to feel good by watching the super-extraordinarily stupid as they are, themselves, extraordinarily stupid.
Is it any wonder they cheer Marnie and Bear.