It’s not really difficult. Racists don’t like being called racist and want to say racist things without being called out for it. When they are called out for it, they complain it’s against free speech.
Sometimes, yes, so I partially agree. But I do think you've oversimplified the issue.
Free speech isn't just about defending someone's right to say offensive or racist things. It's a much broader principle. It's about protecting everyone's ability to express opinions, criticise those in power, debate difficult issues, and challenge prevailing ideas without fearing state punishment.
That's why I'm uncomfortable with people being jailed over tweets. Unless speech crosses the line into criminal conduct—such as directly inciting violence or intentionally encouraging hatred in a way the law recognises—I don't think the government should be imprisoning people for expressing opinions, however unpopular or offensive they may be.
Free speech is important because the same powers used against views we dislike today can be used against views we support tomorrow. A society that allows open debate is more likely to expose bad ideas, correct mistakes, and hold governments accountable than one that relies on censorship or criminal sanctions. The answer to bad speech is often better speech, not more state intervention.
The broader question for me is why the political left no longer seems to treat free speech as a fundamental civil liberty in the way it once did. Historically, many on the left were among its strongest defenders because they recognised that the ability to challenge authority and express dissent protects minorities, campaigners, trade unions, journalists, and political opponents alike. It seems that, for some, preventing harmful speech has increasingly taken precedence over protecting free expression, and I'm not convinced that's a healthy shift for a liberal democracy.