Why do you consider the posting of his SSN to be a valid reason for a Tier 1 provider to censor the entire site?
Also it's interesting how this provider isn't attempting to do the same for Doxbin, which is the source of this dox:
https://doxbin.com/upload/LizTheGrey
This indicates that it's not really about the SSN (which isn't even visible publicly on the KF thread), it's just a convenient excuse for censoring free speech that Fong-Jones and his helpers don't like.
Her Social security number was posted on KF, and this is something that came up in her leaked complaint emails.