Look at Ted Kaczynski, a terrorist with some very strange ideas. Although he had freedom of speech, he had no means to get his ideas out in front of more people. He had to resort to extreme measures, like a bombing campaign to blackmail newspapers into printing his manifesto.
If he was active today, he’d just post it on YouTube and gather millions of views. If YouTube gets squeamish about the violence, move to Parler.
It was easy to guarantee freedom of speech to everyone when people like Ted no means of actually broadcasting their ideas without being gatekeeped by newspaper editors.
Our world is different now. It saddens me to say this but maybe our principles have to adapt too.