User blog comment:Boradzombiecreeper4/Blood Raven origins/@comment-25222488-20140806024757

the amount of hell the blood ravens go through and as far as i have had seen the choas space marines have a particular interest in the blood ravens, you could be right maybe they want to get revenge from the horus heresy over the fact there own formed a chapter with such skill and knowledge and firepower to destroy choas.

(hope this makes sense)