What is really interesting here, from my point of view, is the very real need to stop violent, spreading civil disorder which could overwhelm the police vs. the importance of free speech, especially political speech.
All human rights are qualified. Including (and especially) the right to expression. This is because it is recognised that words can be powerful (I mean why do we waste time teaching children to read and write otherwise).
All of this discussion would be redundant it everyone agreed at the start that we all have the freedom to say what we like. And with that freedom comes a responsibility - whether we like or or not - to use them wisely. And with those two precepts out of the way, then the final leg of the stool is the power of the law to address individuals (or organisations) that cross a line.
You can argue over where the line should be, and how it should be applied. But it exists.
It's interesting that people who feel LC has been harshly treated don't seem to want to accept that. Whereas people who understand why RJ was found not guilty do accept that (as far as I can see).
That't some underlying principles. It seems there are some unique factors in both these cases that are highlighted in comparison.