In other words, “free speech platform” is not actually “free speech platform,” rather it is a dogwhistle.
Often, but not always. It’s a mistake to immediately assume that it is one (the reason is at #2). Because sometimes it’s just the result of cluelessness over the three things that I listed.
What will decide if Squabbles’ admins are genuinely dogwhistling are their future actions. The dogs will get on the garden; let’s see if they shoo the dogs or give them treats. (I think that there’s some chance that they shoo the dogs, based on “With the exception of racist content, the use of slurs (racial or otherwise), targeted harassment, and incitement of violence”).