I know you're just clarifying it and not necessarily advocating it, but just want to state that it's a pretty lousy justification. For example:
(1) Mike Smith pays taxes to the powers that be, and therefore works 3-4 months out of the year for the powers that be; (2) The powers that be are bad; Therefore (3) murdering Mike hurts bad people.
(1) Mike Smith pays taxes to the powers that be, and therefore works 3-4 months out of the year for the powers that be; (2) The powers that be are bad; Therefore (3) murdering Mike hurts bad people.