User blog comment:Supahbadmarine/Official Canon Policy/@comment-77.78.234.37-20130227181608/@comment-2253300-20130227183820

I don't believe that a gene-flaw could exist that makes one suddenly love Xenos. For that matter if one did exist the psycho-indoctrination that Marines go through would have gotten rid of it, and even if that wasn't the case such a Chapter would be disbanded. Space Marines exist for war. A Chapter of tree-hugging tolerant Marines has no place in the Imperium.