She was also did what was in 1985, unthinkable, volunteering to be a hands on care-giver to AIDS patients. Please read this Op-Ed, which is about her; her mother-in-law who was a part of the Civil Rights Movement; Prop 8; our confused, screwed up, scared nation; and Tony Kushner's Angels in America.
I've had a lot of cause lately to be all old, and cranky, and people were dying and you weren't here and you don't get it -- well, this might make it make some sense. And if you haven't read or seen Angels in America, you probably should.
Note, this piece does draw parallels between the Civil Rights Movement and issues related to civil rights for LGBT Americans. While these two struggles totally have things to say to each other, there are a lot of fundamental differences involved, and I think it's important to remember that to respect both African-American and LGBT history in the US.