This was the America of the last half of the 20th Century, and the first part of the 21st.
It cannot be understood, because the people in it do not want to be understood – and consider this unnecessary, and even shocking.
Anyone who tries to understand them, is being critical of them – and does not appreciate how perfect they already are.
Or perhaps this explains them better – they know how inadequate they are, and they do not want this noticed. Everyone behaves badly – but it is not nice to notice this.