Is it because their primarch looks like an Angel? or is it because they have red colored armor? The real reason is me and the angels have a gene-curse well not actually but you get the point. Since I was a kid I had this fascination with blood. I wanted to try drinking it using it and more than usual spilling it .....oh cmon you play dawn of war and you have no urge to spill the blood of your enemies? I have Thallasemia Beta a gene-curse in most asians. In ancient times Thallasemia B was a great thing to have since scientific study has shown people who have it are more resistant to malaria. That's great news for me but I'm generally weak because of the anemia it brings. Like I said it's a gene-curse good to have in the right situation but a burden to carry akin to the red thirst and black rage. So thanks for reading this and may the Primogenitor and the Emperor be with you.