Earlier quoted context omitted.
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https://www.motherjones.com/politics/2023/02/kiwi-farms-die-... https://fortune.com/2022/09/05/kiwi-farms-so-bad-cloudflare-... It is anything but false. They bragged about their kill count. Do you have any source for your claim?
While I don't know the specifics behind your other link, like most articles about it it's using second- and third-hand claims; given there was an orchestrated smear campaign against the site, I'm sceptical. It was certainly convenient that Kiwi Farms was removed from the Internet Archive just as articles like this were being published, making it impossible to verify or disprove any of their allegations. If you're worrying about sources (which you are absolutely right to!), I'd start there; do the posts that article is talking about actually exist?