McDonald's Cashier Frightened of Dwarves

[Tadao]

Let's say that she can not work a fryer or a grill, or they have those positions filled and need front line workers. Would it be against the law or policy to deny her a job based on that? I think it wouldn't, but then again, HR usually has no balls when it comes to these things. It's also unclear if management was aware of the phobia, it might have been a friend of hers that tried to explain it to the little ugly freak.