Why Does 8chan Exist at All?

Fredrick Brennan in a photograph he provided the The Wall Street Journal in 2019

This past week, we experienced the third mass shooting to emerge from 8chan, an infamously vile message board, known most recently as an epicenter for the alt-right.

The shooting that took place in El Paso killed at least twenty. It was a copycat of the Christchurch massacre in March which was livestreamed on 8chan by a user who coated his weapons in 8chan memes. In June, a teenager on 8chan attempted to…