Hardened political rhetoric and seasoned talking points aren't on topic here (regardless of which way the political vector is pointing). If you check out the site guidelines, it should be clear why: https://news.ycombinator.com/newsguidelines.html.
You don't have to agree with anyone's views but this style of argument is deathly to the curious conversation we want here. Curious conversation requires, among other things, respect across differences—wanting to learn more about how someone thinks, and why they think that way, and trusting that they have good reasons for all that even if, in the end, they're wrong. And, of course, you and your views deserve the same consideration.
If you want to argue against someone's views here (Garry's or anyone else's), you'll get much further by making your substantive points thoughtfully. We're trying to avoid the online callout/shaming culture here, at least to the extent possible on the open internet.
The culture of political attack goes very much the other way, of course—people save screenshots of the worst things they can find, bring them up at every opportunity, and so on. Guilt by association is another common tactic. None of this helps us really understand each other—anyone can be made to look bad that way, so it really doesn't have much persuasive power. It does get one's own side riled up (in a yay way) and the opposing side riled up (in a boo way), but riler-uppers are what we're trying to avoid on HN, because they destroy the curious conversation I was just talking about.
(I hope it's clear that all of the above should and does apply equally to opposing political sides.)
I explicit reject this idea that it's unfair to point to things people have said, even if they're screenshots. Sorry, that's just deciding that you can pick and choose data to ignore.
There's not really much curious conversation when they happen, and not really a huge chance of it, either. As an example, the announcement of sama taking over was a hundred and fifty comments of almost exclusively "Congratulations!"
They're posts that are almost exclusively doomed, either to incurious compliments, insults, or needless pessimism; what questions that are asked usually don't get answered, so there wouldn't really be a loss in it anyway.
Also, job ads get placed on the front page by software. This submission got on the front page by upvotes like any other.
Re 'facts': this is a red herring. There are infinitely many facts. They don't select themselves; humans do that, and they do so for non-factual reasons [2]. As a matter of fact, "but it's a fact" is the most beloved defense of trolls—not that you mean it that way. (Edit: incidentally, I have no idea whether your claims about Garry, including the ones you deleted, were facts or not - but I'm assuming they are for present purposes because it makes the moderation point stronger.)
The problem with your post is that it was obvious online agitprop—in fact one couldn't find a more classic case (edit: before you edited it—it's less that way now). That's off topic on HN, but not because of trying to protect YC from criticism (we don't moderate HN that way [3] – plenty of people criticize YC here), nor because of political disagreement (there's room for a wide range of views, as long as people are using the site as intended)—but rather because it makes threads more predictable and nastier, and therefore more boring. We're trying to optimize for something else on HN [4].
Edit: I just noticed that you edited your GP comment to take out a couple of extreme guilt-by-association references and to add a relevant tweet by sama. Those are two steps towards an on-topic sort of political argument (good), but if you're going to edit comments after they've gotten replies, it's only fair to do so in a way that doesn't deprive other posts of their original meaning. My description ("hardened political rhetoric and seasoned talking points") was accurate about your original post and is less so now. In other words, you subtly changed the thread to make the moderation look less neutral and fair than it originally was. I hope that was just an accidental side effect, and that your motive for making those edits was a sincere desire to use HN as intended.
[1] https://hn.algolia.com/?sort=byDate&type=comment&dateRange=a...
[2] https://hn.algolia.com/?dateRange=all&page=0&prefix=false&qu...
[3] https://hn.algolia.com/?dateRange=all&page=0&prefix=false&qu...
[4] https://hn.algolia.com/?dateRange=all&page=0&prefix=true&sor...