I never said that. Kalama as he is here can be killed (at full power, he is immortal). Ancalagon was killed. You don't have to be immortal to be a god. Just look at the Norse gods. The Norse apocalypse myth had their entire pantheon slaughtered, with only Loki surviving. The word god is a measure of power level, not whether or not you can be killed. Deadpool is immortal, but he's no god. Thor is a god, but he's not immortal.

It's not like I'm sticking Bahamut here.