That is just the tip of the iceberg, one of his MANY racist posts from his blog. I won't link to it, but go read the whole thing, including the comments sections, if you really want to know what he and his followers are really like.
His favorite technique is to play this game of Libertarian Chicken, where he says something that's totally racist on its face, just to bait people, and then attempts to argue that he's actually operating at a higher level and much more clever than everyone else, and is really right, but just misunderstood, because everyone else is an idiot.
Russ Nelson made a ham-fisted attempt to emulate Raymond's standard technique in his "Blacks are Lazy" posting, but it cost him his job as President of the Open Source Initiative.
But ESR threw down the gauntlet and made a full throated public defense of Russ's "Blacks are Lazy" premise, by attacking the people who wanted him removed as "fools" and "thugs" (dog whistle for the n-word).
Raymond actually wanted OSI to get into a public knock-down drag-out fight with the "social justice warriors" who wanted Nelson to resign, at whatever cost in cash, credibility, alienating minorities, and endangering the mission of the OSI. Not exactly a shining example of leadership.
https://en.wikipedia.org/wiki/Talk:Russ_Nelson#Blacks_are_la...
Note that although Russell withdrew the article, and admitted it was badly written, Eric S. Raymond is on the record as having defended it by accusing people asking Russell to step down as being "fools and thugs". Note that "thug" has been called a "dog whistle" term for "n*gger".
https://web.archive.org/web/20140126142113/http://aattp.org/...
http://www.eweek.com/c/a/Linux-and-Open-Source/New-OSI-Presi...
Eric S. Raymond wrote: “The people who knew Russ as a Quaker, a pacifist and a gentleman, and no racist, but nevertheless pressured OSI to do the responsible thing and fire him in order to avoid political damage should be equally ashamed,” Raymond said. “Abetting somebody elses witch hunt is no less disgusting than starting your own.”
“Personally, I wanted to fight this on principle,” Raymond said. “Russ resigned the presidency rather than get OSI into that fight, and the board quite properly respected his wishes in the matter. That sacrifice makes me angrier at the fools and thugs who pulled him down.”