Penguicon (sci-fi and open source con) is having a cultural moment. Two notable attendees are complaining about "SJW"s. While I disagree with them, I find their descriptions of their perspective informative, particularly ESR's.
Here is Jay "Tron Guy" Maynard's original post:
https://medium.com/@jmaynard/mpga-d4b72ec08ed4
And Eric S. Raymond's response:
http://lists.penguicon.org/pipermail/penguicon-general-penguicon.org/2017-May/000135.html
If you want a clear description of how very smart people justify bigoted beliefs, these are good ones.