The thing is that there are actually multiple different, and in some cases fundamentally opposed, principles that people use that name for.
One is the principle of robust competition of ideas in the marketplace without government fingers on the scales, with ideas succeeding or failing in large part on their ability to convince people to expend effort and resources relaying them, which happens to be very closely aligned with the shape of the legal concept of free speech in the US.
Another seems to be the idea that there should neither be public nor private consequences, including in other private parties decisions whether or not to relay your speech, to speech, even to the extent that enforcing this warrants active government action against recalcitrant private parties.
This isn't a new debate or problem of course, just our generations version of it. For most of written history censorship was a giant fight over who got to have printing presses. The "free press" is an important concept that came out of this era, and is respected even in countries that don't have a First Amendment.
With respect to lacking consequences for speech, what people actually want is a lack of consequences for exploring and taking part in the marketplace of ideas. That in turn only really comes up when one side or another decides that competing over ideas is too much like hard work, and it's easier to just punish people for not agreeing. The consequences aren't connected to actually losing any debate but simply taking part in the first place. That's a social issue that is only resolved ultimately through debates like these.
Not really - if that were so, they would have no complaints about Musk's purchase of Twitter.
So yeah, I oppose censorship of "racism" and "hate speech" because I don't trust the powers that be to maintain reasonable definitions of these terms.
Do you believe Twitter has been that inconsistent with their policies?
Furthermore the definition of racism has become quite soft and not because of real racists at all but they will profit from that.