There is actually a ton of helpful feedback in that email in between the verbal lashings. I don't think he's trying to hurt this guy's feelings as much as he's

There is actually a ton of helpful feedback in that email in between the verbal lashings. I don't think he's trying to hurt this guy's feelings as much as he's trying to emphasize the importance of his point, which seems to be a tenet of the Linux kernel development philosophy.