Let's consider some observations (I won't call them facts):
-A few people in a few online FLOSS communities are sexist.
-Women in general are not interested in computing, and a very small proportion of the ones that are use Linux.
How dose this imply "free as in sexist" ?
Well, if you want to find out, read this long essay, which is mostly padded with meaningless words and statements arranged in a nonsensical order.