Umm I think you are mixing things up. The quote I used as evidence for The Wolves wiping out "The Purged Legion" had nothing to do with Lorgar or Magnus. That was just one of two to prove that we do know what happened to them. The quote about The Rout being the ones to purge one of the lost legions was Russ talking to Kasper who was a famous human historian for the Wolves. He specifically states that it was not the first time the Wolves had been sent to sanction another Legion. He could have just been speaking about him being sent to bring Angron to heel however he says it as essentially "god no" which means this probably was n't the first or second time but rather that it happened a few times before. It also talks about him getting very sad talking about it and we know there was no love lost between Russ and Angron. Also You gave great examples of narrator bias in your post. Qualitative statements can fall victim to conjecture but generally a response like that cannot. That would be like someone asking if it was your first time eating fish and you responded "god no." You could be lying but if you were then the entire conversation would serve no purpose unless you qualified it later which they did not. Also once again we do know what happened to the legions because GW told us what happened. One rebelled and was then purged. The other was lost due to some tragedy. Hence "The Lost and The Purged" or "The Forgotten and The Purged" depending on the source. The allows you to forge the narrative for Order and Chaos since one fell and one was lost. I could list other sources for example Sanguinius being afraid to tell the Emperor about the Red Thirst because of "the most radical soultion his father could propose" but really who has the time and if straight quotes dont convince you then nothing will.
I took the quote wholecloth, the meaning of the quote is what matters. GW will never *tell you* what happens to the Lost Legions, there's a mandate on the Black Library to not do so, even being empowered with the Horus Heresy. I wish there was more to it then that, but there's just not. Whats more likely to you? that the Space Wolves really are the Emperors executioners and Dan broke the cardinal rule of the Lost Legions? OR The Space Wolves simply view themselves as such, but that's not necessarily true. There are implications that they *may* of purged the lost legions, but no conclusive evidence. Likewise, this is from the mouth of an author. I don't mean to sound snide, but that's about all the evidence you need really.``
It had to be something with one of the Xeno races. Chaos would be all over that spreading rumors and telling the stories now if they both just joined chaos and became traitors. Also many space marine chapters have become simply lost over time and those stories are told. Xenos are considered the worst of the worst just look at the Gue'vesa. Gue'vesa are humans that joined and fight alongside the Tau. " Gue'vesa are considered be the very worst kind of traitors to the Emperor of Mankind and are believed by the Ecclesiarchy to have been spiritually corrupted for willingly associating themselves with a xenos culture." From that it sounds to me given the choice to switch to Chaos or Xeno you will be hated more switching to a Xeno side.
Actually I think something different all together. I think that Dan didn't actually tell us anything about The Purged so it doesn't fall under your golden rule. We already knew one of the legions was purged straight from the mouths of GW so saying it was the Wolves who did it doesn't tell us anything about the legion it tells us about the Wolves and cements their purpose. We don't know the events that caused the purge. We don't know their Primarch's name. We don't know what made him special compared to the other Primarchs. We in effect still know nothing more about the Purged Legion than we did before the books. We in effect learn more from Corax's conversation with the Emperor where we learn that the Lost and the Purged legions were already gone by the time the Emperor met Corax or from Lorgar's conversation with Mortarion where they talk about it being the most Primarchs in one place since... meaning they were already gone before Ullanor. Both of those give more information about the timeline than has ever been stated.
No, because then it tells us the Wolves actually killed them, and therefore gives a critical detail of what happened thus invalidating anyone playing from one of those 'lost legions' who might have a different story about it altogether.If ADB doesn't think that, and generally speaking his books tend to *support* the Executioner theory, then do you think that's the whole truth of the matter? I personally, don't. Facts are facts man. If you want me to just lie to you then I can do that too and join in the rampant speculation. My insane conspiracy theory? Rogal Dorn wasn't killed during one of the Black Crusades, he was actually assassinated in secret by the Rainbow Warriors.
I think it bears noting that in Betrayer it was quite plainly stated that when Russ went to chastise Angron it was not actually under orders from the Emperor, but rather that he felt it was both his duty and role to do as such. He had a lesson he wanted to teach Angron about brotherhood and controlled savagery, one that failed. Now, this could be untrue, but it certainly gives credence to the idea that he was not referring to that incident. Yes that's basically how I see it. There's a few reasons why I don't think it could have been chaos, for one, then there would be rumors about the true nature of the warp and supernatural shit, which would have forced the Emperor to have talked to somebody about chaos. Furthermore, even the Chaos Primarchs continue to not talk about them (yeah it's gw policy buuut...) which would not make sense if either had been the first to turn, would it not make much more sense to hold the Lost Primarch as the first martyr for their cause? Since they seem to still disapprove of whatever these two did, then it must be something else. Which is why Xenos make perfect sense. The Chaos Legions were still humancentric and despised Xenos, so if one of the two had put his lot in with the alien, then they'd still want them forgotten. I mean it was the Emperor who ordered their censor, there's no reason for them to honor that order after they turned unless they agreed with it. Plus, in First Heretic when Argel Tal and pals go back in time they consider killing one of the lost to save Lorgar the grief of their loss, if that Primarch was a brother to their cause, then their first thoughts upon seeing him shouldn't be "hey let's erase this guy before the Emperor does."
You aren't stating facts though... In fact you have given nothing to justify your position. You are using the same reasoning as Moon Landing doubters. There is video, there are pictures, and they even left a reflective module that we can even bounce lasers off of now but there are still "doubters" and given space travel constraints at the given time it is impossible to "prove" them wrong. It is impossible to disprove a negative. It is not just Space Wolf books that give credence to Russ being the executioner nor are they just Dan's books that provide this evidence. Graham McNeill was the author of Outcast Dead in which 2 of the Cryptaesthesians are talking about the Emperor's disapproval of Magnus's actions: "It will mean the Wolves will be loosed again." Evander Gregoras talking to Kai Zulane These characters have no personal interest in spin either direction for this conversation so there is no reason to not believe this statement. Again we could do this for hours but its impossible to disprove a negative so I'm going to stop bothering. You can believe whatever you wish to believe.
Moon landing doubters? Seriously dude? I'm pointing out there's a rule and there's a reason why it's implied and not shown. There is a mandate that says to the Black Library authors, in plain and simple words: 'You do not show the fate of the lost legions' aside from that bit with Corvax we just don't know what happened and never will. Does that mean you can't say that's the most likely reason? No it doesn't, but that is a world different from saying it happened. Comparing that to doubting the moon landing is sheer insanity on such an extreme level that I have to use italics just to express how crazy it is.
Can't you prove moon landing doubters wrong with a high powered telescope and a significant amount of down time? I believe we left our flag there.