Is this saying the viewpoint is that violence against the government (capitol police) is supported, violence against local police is not supported (back the blue) and violence against citizens is supported (back the blue)?
Suffice to say, like most ideologues, the beliefs make sense when analyzed in accordance with the logic rules of the holder of the beliefs.
Think of the beliefs being discussed more as doctrinal tenets of a pseudo religious sect, and you get a little closer to the thinking of the adherents.
Members of the in-group have divine right and shouldn't be bound by laws. Anyone who opposes them is the enemy and should be harmed or destroyed.