Wait, Marca are clearly inferior, because? Is this the stupidest presentation of racism I ever saw? They are claiming inferiority of Marca race without any other, even bullshit reason than "I just said so and everybody know this".
I would understand if they said: "Marca are thiefs" or something like: "they are ugly, stinky race of traitors and cowards that betrayed our empire". But simply saying "They are inferior" the end?
I see Isekai logic is going at full power.