> It’s incredible that supporting free speech is considered to be only important enough to the “far right” now to be worth marketing to.
> Free speech used to be something all Americans supported and defended.
It's not that most Americans don't care about free speech. It's that most Americans understand that constitutional free speech means the government can't infringe on your speech, except in limited circumstances (like extortion, inciting violence, inciting panic, divulging classified material, etc).
The reason companies like Gab and Parler market 'free speech' to the far right, is because the far right often engages in trolling, harassment, incitement to violence, disinformation, and bigotry in social media. As such, they run into the moderation policies of those platforms and at some point start running into bans. Not to say other parts of the political spectrum don't run into moderation and bans too, but it's a bigger problem right now for the far right.
There's a debate to be had about the power social media giants have over public discourse and whether internet service providers should be able to blacklist companies like they did to Parler. But that still doesn't fall under the umbrella of constitutional free speech. Businesses usually have wide latitude to refuse service to customers, particularly for toxic behavior.