Why would Rashad question the sincerity of Chief Killebrew's card? Is Rashad justified for doing so?

Rashad wonders if the creed is supposed to make him feel guilty for his eleged "wrongdoing", or if it is supposed to make him feel that he is still a part of something bigger. Unlike his father's relationship with the military, Rashad feels uncomfortable about the connections between ROTC, the military, and the police.