If you think Musk intends to support "free speech" on Twitter you are sadly mistaken.
For Musk, free speech is speech that he likes. If he doesn't like it, he's gonna shut it down.
It's like all the right wing pols. who whine about how THEIR speech has been shut down, but they are extremely eager to shut down the speech of everyone who doesn't support their radical agenda.
The term "free speech" is bandied about the way "gun rights" are. Those who rant about the 2nd amendment in fact don't what black people or people of color to own and use guns.
"Freedom" is a word easily used to support every cause under the sun. Even fascism.