"Because I am the very definition of a 'San Francisco liberal', I live in a bubble, my staff lives in a bubble, we know nothing except what we read in the Slimes or the Compost, and we haven't read anything from any conservative sites because our heads are so far up our bubbles that we don't even know any conservative sites ... ?"
I am the very model of a San Francisco Liberal,
I've a mind that's somewhat like a vegetable,
I know the mind of Lenin and Trotsky and socialism historical,
From Alinsky to Soros, in order categorical;
I'm not well acquainted much with matters mathematical,
Nor with religion, both the simple and heretical,
About social justice theory I'm teeming with a lot o' news---
With many cheerful facts about the effectiveness of bootleg booze.
For my constitutional knowledge, there's not much anchored in realism
Because most of my experience is in the spreading of communism;
But still in matters local, state, and federal,
I am the very model of a San Francisco Liberal.
adaptation from Pirates of Penzance
Gilbert and Sullivan
It is called confirmation bias.