From the cursed founding, the Reforged inherited a strange geneseed corruption. A lack of inherent hatred towards xenos. Over time this has led to these Astartes, forming alliances and even "kinships" with certain species. whereas this will not stop them from fighting when needed. Due to this, they are branded renegades and heretics. however they still fight to save the imperium... as well as broker a peace that in truth, cannot be.