These developers do not wield power over anyone and they are not filing lawsuits. They are developing code, either as their job, or as volunteers. And in either case, contributing their work as open source.
It might help to take a little perspective before publicly passing judgement on _individuals_ and what you imagine their intentions to be rather than merely judging the merit of their contributions. Those are completely different things.
I get that the two things have some overlap and aren't cleanly divisible. What we do is a major part of who we are.
But I mean, it's one thing to say "I think it [his architecture] is awful", or even "I think his architecture had a negative impact on people/society/cherished values/whatever" but quite another to say "I think he sought the ruination of everything good and decent because he was a demented and feeble mind." Because, yes, I do think the last one would only be appropriate if you actually knew something about the guy...
Edit: And yeah, of course, I'm not trying to censor anyone's opinions. Of course you can _have_ the opinion, you can even express it. I just think that it's not what engaging in productive/civil discourse looks like and, depending on the venue, people may call that out or whatever.
I suspect that, in many instances, people who do that are not trying to convince anybody of anything. If they expected to be greeted everywhere with agreement then they would not go around saying things which they know perfectly well are not likely to result in a vigorous and healthy debate if they were said to strangers in the street :)
From some of your other comments I gather that you've been around this material for a long time and you know a lot about it. Why not share some of what you know, so others can learn? and make your substantive points thoughtfully? Then you'll be making this place more interesting, and your points will have some persuasive power. Just venting only adds energy and credibility to the views you disagree with.
I get that there's a low probability this argument will work with you but I think it's worth trying to persuade people that it's in their own interest to follow the rules, which are designed to try to keep a community that's interesting for everybody:
If we are trying to be good open source citizens and avoid unnecessary fights, you can apply it just to that.
I respect that you are willing to admit you don't know the full history and implore others to understand why for example, certain decisions were made. It seems as if many people love to theorize about what these are, making correlations which are usually driven more by their feelings than reality.
I feel like character assassination was a phrase that I feel aptly describes how I've seen a lot of people treat people like Lennart Poettering. I feel as if some people are unable to separate person from their opinions. Not considering that person like they are more likely to do so if they were in person.
I sometimes feel like this attitude is more strongly felt by some people in a community where there is freedom to take a project in another direction if they desired (I know that not everyone has this option).
I do think however that the article of this thread expresses their opinion on an issue in a way that it explains how it effects them without resorting to emotional attacks towards the project and it's something I really liked about reading it.
In such case disjoint between users and developers is even further. I am professional developer, yet I have zero contributions to my framework and just a few contributions to libraries. After 10 years my contributions to Linux community limited to bug reports, few patches and manuals.
In reality there is not enough community support to maintain existing systems. "Freedom to take a project in another direction if they desired" by individual is overrated, that's TempleOS.
EDITED: Some bragging about making a difference
There are a lot of projects with less corporate influence. No systemd on BSD, but hardware support is not as good. Generic distributions is something that works for most of the users. There are a lot of niche distributions and projects (Void Linux runit!). Current state is just a reflection of users priorities.
Is this advice meant to be applied against all people, or just other developers? I certainly wouldn't apply this standard to RIAA lawyers suing kids. I judge them to be worms even though I never worked with them. And don't even get me started on politicians, I've never worked with one but I certainly feel entitled to have harsh opinions about some of them.
If the advice is limited in scope to professional peers, then I have to disagree with it; having double standards for people like yourself isn't great advice.