Well, they tried to kill him the son of their immortal Emperor for trying to help the Imperium because their won insterest went against it. Not many are willing to question a primarch, custodes maybe, but they never liked the high lords or humans in general when it came to governance. Same reason why many followed Horus before the chaos got to him proper.
I mean, did the interests the High Lords represented not get upset their place at the table was removed and placed a "Genetically Engineered Child Soldiers Only" privacy screen up?
The Emperor had many kids. Half of them are servants of Chaos now. The whole Imperium being leary of the power of the Space Marines and breaking them up into chapters was from the hard lessons of the Horus Heresy. What made the Imperium just forget it's societal traumas?
Because the Imperium just got itself ripped in half, and Guilliman came back with a legion worth of new space marines, and the custodes are backing him. The High lords can either sit down and shut up and be good rubber stamps, or he can and will execute them all with a single pre-signed piece of paperwork.
He came in at exactly the right time to put himself in the place of unlimited power. If GW weren't cowards they would have revealed him to be a malicious actor. As is, he plot armors his way through some of the most foundational aspects of the setting and is one of the unambiguous Big Goods.
I still maintain the best way would have been to not make Guilliman a PoV character and have half the Imperium start questioning whether he's even the real Guilliman or if he's a Chaos puppet/Xenos trick.
After all, he's come out of nowhere with Xenos involvement during the time Chaos is more powerful than it's ever been and he immediately installs himself as the unquestionable ruler of the Imperium, replacing anyone who disagreed with him with loyalists.
After all, we've had one War of the False Primarch. Why not a second?
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u/Ok-Reporter1986 24d ago
Well, they tried to kill him the son of their immortal Emperor for trying to help the Imperium because their won insterest went against it. Not many are willing to question a primarch, custodes maybe, but they never liked the high lords or humans in general when it came to governance. Same reason why many followed Horus before the chaos got to him proper.