You didn't really provide the letter out of which we should be able to deduce the benefits. However, Crusaders would say that the benefit of the crusaders were that they regained the holy land and could also profit out of this either by looting and pillaging neighbouring muslim villages or because they thought they were closer to God this way.
He meant it as master or perfect race.
Answer:
Where's the question miss?
Yes it is because most things can stay balanced