Quite big.
The first part of the Twitlonger, before the list of supposed neighbors, basically reads like a very abridged summary of the topics, criticisms and feedback rotating in this very thread. A direct URL to another thread in this subforum plus the copy-pasted post confirms that the writer at least reads Kiwifarms, so I guess it's not difficult for DSP point at KF to be the common denominator. Even though most people are openly showing their disapproval of the supposed dox, DSP will most likely see this as a part of the hive mind that KF is in his eyes. You know how his brain works in that regard... (which in itself is quite funny, as he blocks most criticism on basically every (social) media platform he's active on, but for some reason has a direct feed of whatever's being said about him on the farms).
Most people here know pointing at KF is complete bullshit in this case, and in my eyes it's just a single person who either just happened to stumble upon these forums or someone who's been reading them or even participating in the topics. But still, it's just one individual. One individual who couldn't contain the a-loggery. No community can be held responsible for that. It's like picking one random person from the TKOH forums, and saying every person on there is like that.