The Implications of a Morality Revolving around Sacred Duty

The Implications of a Morality Revolving around Sacred Duty

I am concerned about the possible implications for a morality that revolves around sacred duty. Does this type of morality make all good and evil action relative?

Disciplined by understanding
one abandons both good and evil deeds;
so arm yourself for discipline–
discipline is skill in actions.
(2nd Teaching, 50)

If a man's sole responsibility is to sacred duty, then it seems to me that anyone who commits his actions (or crimes) as a sacrifice for Krishna is a "man of virtue." I am really troubled about the passage below. Does this type of war philosophy and the heavy importance on discipline to sacred duty open the door to a whole host of problems of individual responsibility? Or is this just my Western perspective getting the better of me and not being able to understand how in the Gita morality and religion are inextricably intertwined?

If he is devoted solely to me,
even a violent criminal
must be deemed a man of virtue,
for his resolve is right.
(9th Teaching, 30)