Earlier quoted context omitted.
There's nothing personal there, it's a generic insult. Unless Linus know's about the persons breastfeeding history of course. My understanding is that the person being derided here isn't even a kernel developer.
This is laughable. What would you consider a "personal" insult?
If you call me a dickhead it's not a personal insult, call me fat it's getting there and when it's that [redacted] event when I was drunk a few weeks ago it's personal.
Anyone that find that Linus spray as "brutally personal" needs a cup of cement.