Clearly that's an overstatement - I take it you mean that they are all cases of people calling for limits to speech, but 'hate speech' has clear legal definitio

Clearly that's an overstatement - I take it you mean that they are all cases of people calling for limits to speech, but 'hate speech' has clear legal definitions in many jurisdictions. We shouldn't omit 'libel' and 'slander' which are restrictions on free speech as well, though they rarely seem to cause too much outrage.