I loved this mail, and it's actually making OpenBSD stand out as a human project, because it's not riddled with indecipherable political correctness. You can feel there are people involved, that they didn't copy-pasted a template but actually thought out their words, you can feel the involvement of the people. On the other end of the spectrum a smiley would also make the project more human, closer to the people. This mail also serves as a warning to future people who will want to engage a similar path of "I don't know anything, but I think things should be done This Way" to actually think about it. A net advantage.
Yes, the mail is harsh; that doesn't mean countrygeek should have a problem with it. The latter can (and should) absolutely go back to the research part, try to understand what he asks for, and then come back with a plan. That is what is really asked from the kind of people in the same position.