There's plenty of actual racism around, which of course I don't like, but most of this is limited to /b/ and /pol/ which are not representative of the entire site. They just happen to get in the spotlight more because of how controversial they can be.

A lot of people on 4chan view these boards as a sort of filter to scare away outsiders. The majority of the site isn't nearly that edgy and largely discuss the various relevant topics for each respective board.