YSK: That nazis Don't Actually Believe in Free Speech
Obvious as it may sound, people with authoritarian beliefs hiding behind free speech actually consider it as a weakness akin empathy. It allows losers like them to amplify their reach despite not being in power. They abandon their "free speech absolutist" postures the moment they think they are in power.
The closest I can think of to “real free speech absolutists” is the old-school doctrinal libertarians. Even they have limits on what they believe should be allowed and specifically state that contracts should be legally enforceable.
You don't need to be an "absolutist" to believe in free speech. Open exchange of ideas is valuable. Not needing to be suspicious of everyone hiding what they really think out of fear is valuable. Censorship powers are very tempting to abuse and the consequences of their abuse are terrible, therefore they should be strictly limited. Believing in free speech can just be understanding this stuff and having a bias against shutting people up as a go-to solution.
It's bizarre & disappointing that newer generations seem to associate freedom of speech with right-wing authoritarians when freedom of speech has been a firmly liberal value advanced through the enlightenment & civil rights movement.
Everyone ought to defend it.
yeah it's a philosophical question the answer to which changes with the times (like, does free speech/expression even mean the same thing in the 1700s as in the present era where "speech" is delivered and amplified by machines without even the necessity of direct human involvement).