Short: SJWs dont like person's politics, try to shutdown small programming con due to person being speaker. (from @jcase).
Longer: LambdaConf (a tiny conference for LISP-like programming languages) accepted a speaker with objectionable political views, who under a pseudonym spouted Nazi-like propaganda. "Social justice" activists complained. The conference refused to un-invite the speaker, since his talk content was purely technical, not political. Also, because free-speech. Activists then leaned on sponsors, many of whom withdrew their support of the conference. Free-speech activists took up a collection, and replaced the lost money, so that the conference could continue.
LambaConf is just a tiny conference put on by a small number of people. It exists because, in the last few years, there has been a resurgent interest in "functional languages".
The speaker in question is Curtis Yarvin. He has weird views, like wanting to establish a monarchy. Last year, he was censored from a similar conference "Strangeloop" for a similar reason: a technical, non-political talk censored because people couldn't tolerate his politics. The current talk seems to be similar to last one, about his "Urbit" project.
LambdaConf, in the spirit of diversity, stripped the authors names when they evaluated papers, so that biases about gender and ethnicity don't enter into the evaluation process. They didn't know who they had accepted until after they accepted him.
We all use the word "social justice warriors" or "SJWs" to refer to bigots who fight for feminism, LGBT rights, and racial diversity. They fight for the same things that the rest of us do -- but just with a lot of hate and intolerance for anybody who disagree with them. They've become a pox on the technical community recently. Note that Wikipedia says that "SJW" is a pejorative word designed to belittle feminists. That's not true, as this case shows, as there are ardent feminists on both sides of this issue, but only one side are the SJWs (the ones who don't tolerate people who disagree with them).
The free-speech activists are a bunch of libertarians. In other words, they support feminism, LGBT rights, racial diversity, and everything else the SJWs do -- but at the same time, they support free speech and tolerance of those who disagree with them. Several of them are associated with a blog "status451.com", refering to the new HTTP status code "451", which of course refers to Fahrenheit 451. Among the people I follow on twitter who support this are @maradydd, @ClarkHat, @AliceMazzy, @puellavulnerata.
They used Indieogogo to manage the donations. They sought $15,000, but have gotten more than that after only one day.
There is a big debate about "free-speech" and "social-justice" going on at the moment. Some claim that the speech of some, those with "privilege", drowns out the historically oppressed, so current free-speech norms are not in fact equal for everyone. Indeed, the process of stripping the author's names from papers removes the ability to overcome those historically disadvantaged like women, minorities, and LGBT. On the other hand, in this case, it's LGBT women who are calling this argument "bullshit".
Many technical conferences have adopted the SJW policy of fascist codes-of-conduct. Hopefully we can revers that trend and get conferences to adopt a policy of accepting speakers based on the contents of their talks rather than their politics.