When a person does something freaky they shouldn’t be shocked when they’re treated like a freak.
Nobody’s promised an easy life and when a person stands out as really really different by their own choice, their life might just be a little less easy for a time. Suck it up, Buttercup, and understand that normal people don’t have to accept your bizarreness.
At least the customer didn’t pull out a scimitar and saw your head off while shouting “allah akhbar”.
This wasn’t even intentional. This customer made a mistake. The individual looked a certain gender, so a common mistake was made. Since this employee has an issues of feeling offended when this person absolutely intended no offense at all. This person should not be working with customers, because customers can be a lot worse to you than make a mistake about you.