I concede it is possible someone might write a reasoned and balanced response to Sarah Sharp's blog post. This is not that response. It's lost all credibility by the first paragraph, and only serves to reinforce Sarah's original point about the unnecessary rudeness on the kernel mailing list.
OTOH, was is interesting about this email is that it was posted on Wed, 24 Jul 2013, and Sarah's blog post was posted on Oct 2015. So I don't really understand was the motivation for posting this to HN is (shit stirring?) or what motivated the linked email.