To be fair, Hemaism wasn't actually killed by Old Grehk/Thalmarkin. The religion is not yet dead. Also, the enemy realms never even looted a single temple, so far as I can tell.
It might not be officially dead yet but the temples are closing down due to lack of priests, and will most likely be gone completly before long (cant really check from my place, so just assumed it was already gone).
And well, when it dies, it will be because of OG/Thal even though we might not be the ones putting the final nail in the coffin.
