But free speech isn't - and should not be - the instrument by which freedom is taken away. That would be foolhardiness, and contravene the very essence of that freedom. If it were just speech, and if that were all it was about, well and good. But in political religion - of any stripe - that's never what it's about.
It is never just about speech anyway, anywhere.
I would hazard to guess: because they're not doing anything to anyone that requires punishment from anyone? Really, this is pretty obvious stuff.
I don't think it is obvious at all.
They're exercising religious choice, which should be an integral freedom anyway;
Why?
How do you think that the current state of planet Earth came about? All that pollution, frequent natural catastrophes, depleted natural resources, economy going down ... how did all that come about?
Do you really think that the way people think has nothing to do with these things?
Do you really think that the way people think has nothing to do with the way they act?
Do you really think that the way one person acts has nothing to do with how things are in society and on the planet?
Do you really think that people with completely incompatible belief or value systems can peacefully live side by side with one another?
Surely, in the situation we have nowadays in many countries -multicultural and multireligious- it seems absurd to punish an apostate. Being an apostate to one religion or philosophy often makes one an adherent of another religion or philosophy. And as in those countries no religion or philosophy is treated as the one and only right one, it is impossible to determine who is an apostate to begin with.
But in earlier societies that were more uniform in regards to religion -and many other things-, it was common to punish apostates and dissidents more or less severely. Those societies recognized how dangerous it is to tolerate enemies in their own lines.
A similar phenomenon can be observed in armies on battlefields to this day. The officer in charge carries a handgun and has the order to shoot, on the spot, to death, every soldier who refuses to fight. If one soldier who decided he wouldn't fight would be let go, then all soldiers should be given this freedom too, and the battle would be lost for sure. Which is not what the army is there for in a battle.
But on the whole, we nowadays generally seem to think that we can
afford apostacy, internal inconsistence in society, discord, multitude of views ... Stupid of us, really.