This document discusses how extremist ideologies like white nationalism are spreading through social media. It notes that these ideologies were traditionally limited to small isolated groups but the internet allows them to reach a much wider audience by circumventing restrictions from traditional media. Several studies are examined that show how white nationalist communities online actively link to each other and present themselves as legitimate sources of information. The document raises questions about how white nationalists are adapting to social media sites that restrict intolerant rhetoric and whether the internet has fundamentally changed how extremist ideologies develop and spread.