so does that insinuate that The Great Other is also the Drowned God, Red God(rhyllor) or The Many Faced God? was the voice Varys heard one and the same?
I honestly don't think there are gods. I assume its just magic, and people assigned 'gods' to it as a way to explain it. That article TJT linked earlier makes a good case that some magic event happened that destroyed a moon, and it was the rise of the this notion of gods--one of the meteors hit the water and you have the drowned god. Thousands of them came across the sky (Little shooting stars) and people called them dragons ect. But they all stemmed from an event that people eventually made the legend of the Lord of Light for, just like any primitive people, gods were assigned to something big they couldn't explain.
I personally think the Great Other is just warging gone bad. Children had Greenseers that, like BloodRaven, were able to use blood magic to bond themselves to a weirwood trees (Except when they died they warged into the tree permanently. In the books its hinted that Bloodraven held off on doing this in order to wait for Bran). This magic was used to "preserve" their history and life by putting their most powerful seers spirits in the tree (Kind of like how a Warg can jump into an animals body when he dies--these guys, if they set themselves up like Bloodraven, could jump into the trees). I think these tree spirits are the "Old Gods".
"A reader lives a thousand lives before he dies," said Jojen. "The man who never reads lives only one. The singers of the forest had no books. No ink, no parchment, no written language. Instead they had the trees, and the weirwoods above all. When they died, they went into the wood, into leaf and limb and root, and the trees remembered. All their songs and spells, their histories and prayers, everything they knew about this world. Maesters will tell you that the weirwoods are sacred to the old gods. The singers believe they are the old gods. When singers die they become part of that godhood."
But then the War came, and the children were going to die..so they decided to summon one of these dudes back, an "Old God" and let him jump from the tree, into the body of a man. Except, the thing is, when you warg into something--you eventually become it after too long (I suspect the Weirwoods are the exception to this). When you warg into a wolf, eventually you'll lose your mind and become the wolf. I think the Old God who warged into that dude, eventually became human--and humans 'feel' differently from Children, they are much more driven, and can be angrier.
Humans, with their technology and growth were always kind of akin to Fire in the books--they consumed and changed, while the Children and other Magical creatures were more like Ice, they largely stayed the same. In the books, Amon says before he dies "
Fire consumes, Ice Preserves" You can also see this in their life cycles, humans die quickly but have children to 'grow' their lines, while children have few offspring but live for a long time. In any case, humans and Children are fundementally different in how they react to things--humans don't just step silently into that good night (The Children were fighting back, but from what they said, they were more sad about their demise than angry--if they were having visions, they probably knew their time was up).
Men would not be sad. Men would be wroth. Men would hate and swear a bloody vengeance. The singers sings sad songs, where men would fight and kill
The above is Bran after listening to the Children lamenting that they are going to extinct. I think what happened was, this Old God possessed a human, and after a while lost his mind with anger. When the Children tried to make peace with the humans, he said fuck that and attacked them both. I think that's when these White Walkers went from being the soldiers of the Children, to being "Others" (Not human OR children.)
There is a great post on Reddit
illustrating that the Others are referred to like Weirwoodsor "tree soldiers" a lot (Or in one line a Child's snow knight.) Lends credence to the fact, I think, that what happened was a form of warging, a soul from a Children of the Forest, which had been in the tree as a kind of memory system (As noted above) jumped into the human, and they were going to use that as an army. Except shit went south.