You can only have a stupid, ugly or wrong opinion so long as Musk shares it. Luckily Musk is uniquely dumb, so that covers most awful takes you can have, perhaps giving the perception of free speech.
You have the right to be an antisemite. But just please not in my house, I may ask you to leave.
He, Musk, argues you can say whatever you want on X. This is not true plainly - he is lying. This isn't up for debate so don't bother trying.
That's fine, and is why "free speech" is in quotes