Board Thread:Warhammer 40k General Discussion/@comment-25618639-20150116000231/@comment-25947212-20150116023055

Depends who your asking Alpha/Omega may or may not be loyal and Magnus turn chaos on a guilt trip, the rest are driven with pride, anger, and resentment.

10,000 years of hate further reinforce by the dark gods making un-corrupting a chaos primarch VERY hard, and almost impossible, but hey there might be some intelligence left in their nogging to think about their whole life decision.