The case was specifically about "was a link - a republishing of an article" not, was the thing linked to legal.

In this libel case publishing the article was the offence. So 'if' making a link was also publishing, then an article that only linked to the original that was a new offence.

It doesn't mean that you can put up a message saying "riot at the mall tonight" and then tweet a link to that claiming "you only sent a link" - it's still inciting a riot!

In other words making a link doesn't suddenly protect you from what was in linked to message - it just means that it isn't a new publication of the same message.

In practice it has big implications for both Google (who don't have to police the entire internet!) and for libel tourism - you can no longer pick a convenient jurisdiction to sue in based on somebody there only publishing a link