It is, I'd say, implicitly un-American, in the sense that it celebrates a mindset we have -- outwardly, at least -- shunned.
That moment, he told Steve Kornacki, “personified a mindset that I was part of and that an amazing number of people were part of.”
At the very least, they establish a tone and mindset that rank-and-file liberals imbibe and accept.
mindset mind·set or mind-set (mīnd'sět')
A fixed mental attitude or disposition that predetermines a person's responses to and interpretations of situations.
An inclination or a habit.