Brendan Eich donated $1,000 in support of Prop 8, which made gay marriage illegal in California.
Not sure why I'm getting downvoted for asking for more information, but such is HN I guess.
Those are probably the "big" two threads about it: https://news.ycombinator.com/item?id=7459529 and https://news.ycombinator.com/item?id=7475627
For more, you can just search his name on hn.angoia.com and sort by date: https://hn.algolia.com/?q=brendan#!/story/sort_by_date/0/bre...