Based on comments from Wotc future race development I can’t see how they will justified racial gods.I think the real problem is that settings like FR and Greyhawk just have too many deities. Especially racial deities.
Unpopular Opinion: Either have only racial deities or none at all.
Racial deities in D&D just serve to reflect their relationships on mortal beings and subvert their free will. That's the point of this thread.
Evil Gruumsh before just serves as a vehicle for orcs to hate elves and dwarves and rope humans and halflings in the mix as allies. It'san excuse to copy LOTR's racial diplomacy over without the story and premise.
That's why I like @Kurotowa's Punk Rock Gruumsh. Now his destruction and fury is more sensible and his relationship with the civilized gods makes sense. You can understand wh Gruumsh hates some of them and can make sense of nonorcs following him.
if they make orc freewill creature, it will be silly that they have a god of a single alignment.
maybe Gruumsh will have to recycle into Punk rock after all!