And because it is written (Ibid. 23:17) "… where it is good for him (an escaped servant); you shall not oppress him," I might think that the same holds true with them; it is, therefore, written "and (do not seek) their good."
(Devarim 23:8) "You shall not despise an Edomi": Why? (Ibid.) "because he is your brother": Great is brotherhood.