the amount of people arrested for online activity in England is not the best example to use if you're arguing that such events are rare.
otherwise, your incredulity to such a belief is why the far-right continues to gain a constituency in Europe and elsewhere. so instead of dismissing the concern, which fuels the far-right, you could just acknowledge it is a real thing people are experiencing, and that it doesn't help a liberal free society to criminalize thoughts that are unsavory to the political elite.
Your comment carries some major "Oh you know the ones" vibes.
https://x.com/ndrew_lawrence/status/1050391663552671744?lang...
Conservative: I have been censored for my conservative views
Me: Holy shit! You were censored for wanting lower taxes?
Con: LOL no...no not those views
Me: So....deregulation?
Con: Haha no not those views either
Me: Which views, exactly?
Con: Oh, you know the ones
The "real thing people are experiencing" is posting unambiguous hate speech or calls for violence, and then getting in legal trouble for it. Calling it "online activity" or "just sharing their opinion online" is the actual blatant misrepresentation of what's happening on the ground, akin to saying someone robbing a store was "jailed merely for getting food for dinner that night."