It starts off with this Friendship is magic and magic is heresy It's funny, its cute, and there's nothing heretical on the surface, (After all whats so heretical about PURGING HERETICS!!!!!!!) but think about it. Friendship=Magic=Heresy or A=B=C therefore Friendship=Heresy or A=C and since friendship is heresy. The most un-heretical thing to do is to be the opposite of a friend or: an enemy. All loyalists are considered "friends" to the emperor With this knowledge in mind, the allies of the imperium are actually being heretical by not being enemies to the emperor. Even being slightly loyal to him makes you a heretic according to the above logic. ON THE FLIP SIDE being a enemy to the emperor make you a heretic as well.