Just about every state reckons that there are places where free speech must be limited. Hate speech is one example, and another is where it may threaten a fair trial.

There are awful examples from the past where newpapers have proclaimed a person's guilt from the moment they were arrested or even before. (The classic case is a French paper which in all its reports of a trial refered to the accused as "the Monstrous Assassin" - ending with the headline "MONSTROUS ASSASSIN AQUITTED.")

And note that this is not saying you can never publish anything on the topics the judge has listed: just that you can't publish them now, while the trial is in progress and they might influence witnesses. There have been many examples where a lot of stuff has come out after a trial was over.