I'm just going to point out that the colours of the houses represent their positions on the political compass:
Black Eagles = Red = AuthLeft. Wants to change the system and is willing to go to unreasonable lengths to do so.
Blue Lions = Blue = AuthRight. Wants to keep tradition and give the dead their tribute, and is willing to go to unreasonable lengths to do so.
Golden Deer = Yellow = LibRight. Wants to remove all authorities and borders in favour of international trade, even if they have a good reason for being there.
Byleth/Church = Silver = Centrist. Can ally with just about anyone.
Anyway, back to the image war!