The existence of this blog post suggests to me that they either don’t believe in total software freedom or they haven’t yet accepted that people will take advantage of it.
I read it a bit different, I read it as they're proud of their freedom stance, and they are just informing users about a hostile fork without even hinting at reducing their principals henceforth.
This is precisely my point. Why allow anyone to walk off the cliff if you’re just going to tell them it’s wrong anyway? They could have avoided all of this if it were GPL in the first place.