Their policy applies to content published on twitter, but does it also apply to linking to (or simply discussing) content published elsewhere? Because twitter has been removing posts and suspending accounts for that.
Linking to doxxing is in and of itself doxxing, so you're now doxxing people on Twitter. This does not necessarily apply to all other rules (e.g., linking to someone making death threats wouldn't constitute you making death threats), but it definitely would to some (you're not going to last long linking CP).
Jack's tweets were clear that "simply discussing" is okay, however.