Why did GGG create Greust?

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Zackro wrote:

See what you don't understand is the true lore of PoE.

They are the inhabitants of the island and have lived there. Many are ancestors to the old tribes that long since lingered on the isles for thousands of years.

However we came along...we decided having the coastal region being dominated by a Water-God like Merv. wasn't very good so we killed her. Little did we know that without that monster having such a large territory ownership other things began to move in. [in Merciless go back to act 1, you'll see Nessa now has light green eyes and her hands are darker, she has been corrupted, thus telling us something has moved into act 1 that shouldn't have been there with Merv's protection of her own territory].

Next we move on to the forest encampment, these are mostly the locals. They have a feud with some of the bandit lords but as you can tell everyone sticks to their own sides of the territory, and EVERYONE stays away from the Vaal pyramids because hey...it's a long lost civilization right? Well we don't because we are EXPLORERS!~ So we proceed to ravage the land, killing bandits [Which having 3 of them kept each other in check so that the forest encampment could never be fully attacked or ravaged...oh well guess we messed up that whole situation and gave power to one bandit] If for some reason you didn't side with a bandit you now no longer are following the story line [but that isn't a big deal all you'll miss is in merci after finishing act 2 all the way Eremir's feetthis again depicts corruption, have changed to a different color, if you sided with a bandit you'll notice the gateways leading to river/old fields are both battered now meaning they have been attacked]

Onward to Act 3!~ This is where things get a little weird. Tolman was kidnapped by piety? but why was tolman even out there....and better yet Clarissa is dressed as close to one of the guards as any npc? This is because Clarissa was and still is a black guard [To help hide this better GGG changed her scarf color during the Awakening beta+when it went live] She led tolman to his death and is secretly the leader of the BGs. Piety just happens to be the scape goat to better help her sink in to the sarn encampment.

Now Grigor is there, he knows something is up so that is why he keeps a close on on clarissa, he serves no other purpose.

After finishing act 3 in merci and heading into act 4 if you proceed to go back clarissa's bench is missing a few things on it...as well as the smithy's bench. I wonder where they went?

Onward to act 4, Because of all your acts up until now you've created so many opportunities to allow corruption in it's a wonder...are you actually working with Malachai? The answer is yes, you are. This is why every boss has fought you and has never "attacked" any of the villages they just so happen to live by. Why is it that humans fight against you on their side? Well my good sirs it is because you work for Malachai. But wait? Why does Malachai fight you? That is because you get greedy, it was never supposed to be he gets what he wants, you were the agent of corruption not him! Why should he get everything? With Malachai's dying breath he curses you to repeat your actions. Thus you go act 1-4 3 times, only succeeding to stop in Merci act4 because Zana appears to tell you that with her tool you can break the curse cast upon you, allowing you to break this hellish cycle.

Thus is the lore of PoE:The Awakening, and why Greust hates you because...he should.