edit: Changed wording
As I understand brigading, it involves calls from outside for people to come in, which I don't think it happening here at all.
This is an Ask HN. People are generally expected to upvote accurate answers and downvote inaccurate answers.
An answer which includes false accusations of brigading, praises Musk as brilliant, and suggests that all dissension is due to politics is unhelpful, inaccurate, and worth downvoting. As I said before, I'd have downvoted it myself, but it was already sufficiently downvoted.
Here's 3 pretty good definitions, so you can understand me better.
https://www.urbandictionary.com/define.php?term=brigading
Basically, the anti-elon crowd is manipulating the discussion on HN through mass downvoting and flagging of anyone they disagree with. The goal is to leave the appearance everyone hates Musk.
In terms of the 'outside or off HN" organization, there is a separate word for that but I can't remember it. Something to do with 'raiding' but this doesn't matter.