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The parent poster claimed "for liking a post".
The cases I've seen of "jailed for hate speech" tend to wind up having a harassment or incitement component to them. https://www.bbc.com/news/articles/cy76dxkpjpjo as an example. Hence the request for a cite.
"Parlour, of Seacroft, Leeds, who called for an attack on a hotel housing refugees and asylum seekers on Facebook, became the first person to be jailed for stirring up racial hatred during the disorder."
Wikipedia's "selected cases" for plain old hatefulness, similarly, seems to be all fines, no jail terms. https://en.wikipedia.org/wiki/Hate_speech_laws_in_the_United...
Sounds like you can't (or are unwilling) to produce evidence, and you're trying to handwave that issue away with "it's common knowledge'.
How convenient that the government doesn't make the numbers public and then have to issue statements like this when journalists do some digging on the matter