jaelis
Oh this is where the title goes?
Actually they are wrong. Raven Queen is neutral and her clerics can be Death Domain. Same with Wee Jas and some other gods. And that is in the DMG too. So officially RAW? They are wrong.
Neutral clerics of Wee Jas and the Raven Queen can take the death domain if their DM says they can. Otherwise they can't; that's what being in the DMG means. (Same of course for evil clerics.)