User blog comment:Algrim Whitefang/Fall of Cadia - Gathering Storm III: Rise of The Primarch/@comment-28742621-20170214193326/@comment-8881468-20170215165127

so basiccally you have the person who preached independent marine units so that no person in the imperium would have the power of horus again, to become "horus" .... makes sense for him to spit on everthing he  has done