Here is one of his more infamous statements: http://lwn.net/Articles/430699/ "What I actually suggested in that interview was not so much that the BSDs should adopt the Linux APIs, but instead that people should just forget about the BSDs. Full stop."
He's also been an annoyance in Steve Langasek (Upstart developer)'s Google+ feed, and his post regarding the inseparability of systemd-logind as a main argument for why Debian should adopt systemd, at the time of the heated debates, is another. Among plenty of other examples.
That said, Lennart does not deserve the death threats and the extremer vitriol, but the jabs and sardonic humor are par for the course, given he is a divisive figure, and has made a lot of people mad for good reason.
He's not as abrasive and destructive as Drepper is, certainly, but some people actually find indirect and passive-aggressive attitudes to be even more offensive.
His entire m.o. is passive aggressive asshole, whereas Linus is balls out asshole, but has the relatively unique quality of being right more often than not.
I'd even argue this post is lennart using the genuinely disgusting antics of others as a way to deflect potential criticism of his work in future. This is why, like Drepper, many view him as a long term liability to the ecosystem as a whole.
That's odd... I thought passive-aggressive is when you're deliberately failing to do something you're supposed to do and capable of doing, but what he's usually accused of is actually doing too many things - please clarify this apparent contradiction.
