It fundamentally is not media bias or suppression. The court has ordered that the documents not be released, pending litigation. The leak itself is illegitimate - the publication of the leak is maybe not.
The reason for it not being released is detailed in court documents. It’s not a permanent decision, just one pending the outcome of litigation that has already been filed.
Now, maybe reddit is being dodgy, but at the same time they do have a legal argument to follow that judgment. Publishing the illegitimate leak is itself dubious. That’s why it was done on Musk’s X platform, the place circling the drain due to debt from a leveraged buyout, where right wing extermists can freely experiment with what they can get away with.
I’ll say it again, even in spite of the court order, publishing the journal serves no real public interest. I challenge you to explain how publishing it right now does.
School shootings are not about left wing or right wing. It’s about people whose lives are fucked up wanting to fuck other people up before they leave this world. If you stepped out of the US right wing bubble you might see that there is plenty of opportunity for a much brighter world. Instead, you seem to be focused on saying “See! Other people do it too!” rather than addressing the core problem of people doing it in the first place.
This shooting happened 8 months ago. The shooter has been dead for 8 months. It’s been known that they were trans for 8 months, it’s been known that they were left wing for 8 months, it’s been known that they were extreme for 8 months. 8 months later, this is story is a storm in a teacup, one that has been exaggerated and does not give the full context. This isn’t a manifesto, it’s 3 pages curated out of a ranting journal.
If the shooter were right wing, it would still be just as likely that the court would restrict the release of the journal, on behalf of the children still attending the school, pending litigation.