FWIW, I appreciate the thought when a business offers a discount to me because of my profession — sometimes I accept it, but most often I do not. That is their prerogative to run their business as they see fit. I certainly don’t ever expect it or get upset if they don’t offer a discount.
So your OK with them giving a discount to one city's Police Dept but not another city's?
Or giving a discount to the Marines and not the Army?
Not upset, it is what it is--but just saying what it is and the realization of the issue.