But the heater was put there by something, so removing it doesn't mean there can never be another heater. It just means there is no heat for now. The electricity just works, you just need a new heater to transfer the already existing electricity into something tangible you can use like heat.

And it was just one of the characters who said that they were gods. But really how would any of of them know? They were just parroting what they had been told. Obviously if they were killed they couldn't have been all that godly.