What Was Richard Dawkins Thinking?

Richard Dawkins recently re-tweeted a tweet that is so obviously false, one has to ask, “What was he thinking when he posted it?”
I’m not going to embed the tweet here which is arguably NSFW, but I’ll provide a link and describe it. It has two photos. On the left is a picture of Matt Taylor, the scientist who wore an inappropriate  shirt. On the right is a picture of a Muslim woman being executed. The caption below the two photos reads, “One of these two pictures upsets Feminists. The other one shows the execution of a woman.”
I’m almost at a loss for words. One may agree or disagree with feminism, but I don’t know how someone as intelligent as Dawkins could actually believe that any feminist would not be upset about a picture showing the execution of a Muslim woman.