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.

His hijacking of Wolfgang Draxinger's CCC talk: https://www.youtube.com/watch?v=CmPKDeo9Oow

Announcing udev becoming systemd-only while referring to potential detractors as "systemd-haters": http://lists.freedesktop.org/archives/systemd-devel/2014-May...

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.