There's obviously jokes to be had (Karens, riggers), but with rare exceptions I only ever see objectively racist posts on Gab or the Donald from new users. In fact I see far more racist comments on mainstream websites like Reddit and Twitter.
I wish we could access the browser and cookie history for journalists. I guarantee you would see the most vile sock puppet accounts.
They also have access to enormous amounts of child porn when the -ist/-ism avenue doesn't work.