Rockville, IN is a small conservative town in a very conservative state. I find it hard to believe that the manager behaved this way unprovoked.

That particular Burger King may not have a policy to give a military discount. I'm sorry to have to explain that not every business is required to do this.

As for not serving the OP for regular price, that is very hard to believe unless the OP threw a fit and she refused to serve him at all.

That being said, it is not impossible that a rogue manager with personal beliefs in direct conflict with nearly everyone living around her couldn't have refused service solely on the basis of the OP's military status, it is just very unlikely.