From a PR point of view I agree that tone matters. But I find it unreasonable to expect people to be very nice and friendly when they're attacked by a brigade of mostly bad faith actors, whether it's just people who refuse to read up on a topic before expressing their strong opinion, or actually targeted attacks to intimate developers into not writing or reviewing code. That, and he's just French :-)

Well, I am not the one who wrote this blog post and is asking others to change their behavior.