You've eluded to one thing that should be thought of:
State sanctioned hacking
Now if you are in the security world it is not unreasonable to suspect that code commits to open source projects could be intentionally designed to allow certain hacking techniques to be successful. Now Linus is arguably one of the best coders out there (especially where code meets the hardware) and I am thankful that he is guarding this code.
Look to a government paying someone's tuition is pennies if he agrees to integrate this "code" to his commit for this debt to disappear. To this poor programmer with flexible morals, they would easily do this for much less than tuition but hey, this is the world we live in, and welcome.
We live in much less certain times especially when it come to technology, there are things going on that most people have a hard time accepting is happening and the country you are living in is probably one of the worst perpetrator of this.
Like many have mentioned, this outburst does not happen without many warnings before hand. His approach is truly needed, he just needs to learn how to make it not personal that is all call what you see as shit, not the person who wrote it, unless they have a habit of doing so on a regular basis. At that point have-at-him, they've earned it and hopefully the shame keeps them from doing so in the future. But we often forget what sociopathy or psychopathy really mean, they don't feel shame or any guilt at all they will not understand why. They will continue and as some have mentioned they should be given a time out and ignored from future contributions until they understand they can't play games, this is real life with real consequences.