No, MetalSlimeHunt
I mean how he's (basically) all of them simultaneously, throughout the entire (leadup to the) Horus Heresy, if you accept Black Library as canon and know the right books.
I'm aware, but that's how I reconcile the multiple portrayals. I think it paints a more interesting character overall.
Sidenote/observation: I still don't get why humanity, which hasn't been around nearly as long as the Eldar, from what I can tell, created three Chaos Gods on one dinky planet, when they have lower psychic potential than Eldar. (also if you buy the Shaman fusing story of the Emperor; I wonder if the Eldar ever did something like that, and it just eventually got bored after it won and went off into the webway)
Shouldn't the Eldar's previous wars/bloodshed, on galactic-ish levels, have been able to start Khorne?
Is it that all of those emotions, up until the Fall, went towards their specific gods, rather than floating aimlessly and malevolently?
Depends upon what you accept as true about the Warp. The really up to date canon is that humanity didn't create the Chaos Gods at all, but rather roused them from a period of dormancy. They were created gradually following the conclusion of the War in Heaven, in which the horrific trauma of the war in general coupled with the deaths of the Old Ones corrupted the currents of what was the Realm of Souls into the Warp. These currents coalesced into daemons, which built upon one another in common themes, the three most powerful of which were violence, change, and despair.
These are of course more like spheres of those aspects, leading to the alternate interpretations of courage, hope, and love.
Throughout the millions of years since then, Khorne, Nurgle, and Tzeentch went through cycles of ascendancy and decendancy with the rise and fall of the races they corrupted. Though both the Eldar and Necrons existed through all of this, the Eldar by and large knew enough warpcraft to essentially ignore them and the Necrons are very warp-stilling in general.
And so it was after so very long that on one cycle of the Great Game the Chaos Gods found themselves roused by the flares of thought and feeling by an unknown world in a forgotten corner of the galaxy. Khorne, awoken by the passion for blood and conquest by a man riding to war. Nurgle, awoken by the despondency and surrender of millions suffering the wake of the rats. Tzeentch, awoken by the thirst for change and knowledge, packaged into ever more efficient data by a society driven to the extremes of thought.
And this time, they found things very interesting indeed. The rest is history.