Let's get this straight, there were no "first invaders" human evolutionary progress and development is predicated upon the competition for scarce (land/natural/human/social) resources. The entirety of the human experience regardless of culture or ethnicity is characterized by group violence perpetrated in order to gain control of these vital assets. Successful society by definition and natural law is made of individuals who dominated another. "Righteous" and "unholy" are subjective. Land belongs to those who can defend it. I am sorry to hear you come from a society of losers.