Earlier quoted context omitted.
was it discussion ? or more ?
If you're asking this question, you don't understand the principles of freedom of speech. Read the Aaron Swartz essay linked above, and while you're at it, watch this, from Noam Chomsky: https://www.youtube.com/watch?v=4-oV42OMQoE .
They're still very free to speak have no worry. Also if reddit didn't stop that, they'd be flagged as pro-racist. There was a need for a decision to be made, nothing else.