His actions are inconsistent, and this one of many demonstrations that he doesn't care at all about liberty. That matters because he's now apparently in charge of every federal government agency.
It's the pot calling the kettle black.
Actually this argument makes no sense. I know that it's commonly repeated in propaganda, but that doesn't mean it isn't stupid on its face. You can't just throw people into a collective arbitrarily and then hold them responsible for everyone else you'd call that's actions
The statements "Elon Musk Musk doesn't care about free speech because he doesn't allow (edge case)." and "Free speech has limits." Are non-contradictory.
Additionally, not allowing links to Signal isn't an "edge case," but a considerable offense against free speech (the general concept, not the literal law in the constitution), especially for one who calls himself a "free speech absolutist."