Judging the Past Through the Lens of the Present

Today's rant comes courtesy of debates about Robert Heinlein.  Tor.com has an ongoing discussion about Heinlein and his work, one which has spilled into Twitter and a number of blogs.  Stirring up the anger and ire: claims that Heinlein and/or his work is sexist (possibly racist as well?)

Responses to these claims range from the thoughtful to the religiously righteous.  Fair enough, as the initial accusations probably span that same range.  But I want to focus on two kinds of responses.

1. "