Question: The Prophet's Pre-fire manipulators?

https://www.youtube.com/watch?v=vp8Phzz3oCA
At 12:47 343 Guilty Spark says “Yes, they were accomplished manipulators, back before the firing of the array. I see at least that hasnt changed” referring to the san shyuum

the elite says “Manipulators? What? And before? Before when?”

343 GS replies with “I will explain later”

Before the array the san shyuum were with an alliance with humans.
What did 343GS mean?

Who did they manipulate? What did they do?

Did they perhaps manipulate the humans, perhaps knowing their place in the mantle running them to their doom before it backfired on themselves

Halo wiki said that “Although San 'Shyuum were infected by the “plague” during theHuman-Flood war,[3] it is apparent that they were not as weakened by it as the humans were, since they did not need any uninfected worlds like the humans did.[4]”

What did 343 GS mean?

> 2533274926214546;1:
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> At 12:47 343 Guilty Spark says “Yes, they were accomplished manipulators, back before the firing of the array. I see at least that hasnt changed” referring to the san shyuum
>
> the elite says “Manipulators? What? And before? Before when?”
>
> 343 GS replies with “I will explain later”
>
> Before the array the san shyuum were with an alliance with humans.
> What did 343GS mean?
>
> Who did they manipulate? What did they do?
>
> Did they perhaps manipulate the humans, perhaps knowing their place in the mantle running them to their doom before it backfired on themselves
>
> Halo wiki said that “Although San 'Shyuum were infected by the “plague” during theHuman-Flood war,[3] it is apparent that they were not as weakened by it as the humans were, since they did not need any uninfected worlds like the humans did.[4]”
>
> What did 343 GS mean?

I think it is because Spark is a Forerunner creation (with ancient Human essence), and because the Forerunners made him what he is he would most likely see Humans and San’Shyuum as evil no matter what. The Forerunners despised both species so it is safe to assume they would bran them “manipulators”, “barbarians” and other things.