This is all rather entertaining to watch from the sidelines. Both "sides" in this power struggle are making hilarious cock-ups and are playing hard to their bases, to the point of absurdity. The sad thing is watching people say things like this as if it's some kind of "checkmate, alt-right!" but anyone with even an eighth of their attention resting outside of a filter bubble can see that A) nobody on the other side gives a shit and B) the side accusing Musk of not adhering to his promise has already squandered so much cache over the past 7 years that this kind of reneging, which is by all measures incredibly tame and expected given both Twitter's business interests and Musks personality, is in no way damning let alone surprising. Neither side has moral authority, you're both just street fighting and are too covered in mud and manure to figure out that you're punching in the wrong directions.

Which two sides? I'm only seeing Elon Musk vs the world

Elon Musk has or a had large group of followers.

Yes, and what's the other side?

How's the water today?

Exactly. It's so odd to act like this is a good example of a "free speech violation". The speech being prohibited serves no purpose beyond harming Twitter's popularity. If you're still allowed to convey any actual opinion (with clear exceptions, such as desire for harm to be done, illegal speech, etc), than this is a nothingburger to the people willing to support Musk.

Similarly, it's so minor in comparison to previous examples of Twitter's past suspensions for real free speech violations that nobody on the right is going to come to the suspension "victim's" defense.