<p>I think people here are just worried for you because it’s so hard to determine whether discrimination was actually involved. It’s dangerous to assume that whenever things don’t work out, it’s because of your race or gender; often the world is just sort of weird and dumb decisions are made without prejudice even coming into the picture. That said, I can also imagine how infuriating it would be to be reading these comments if you do have solid evidence that the guy is bigoted–not only are you being discriminated against, but no one will believe you!</p>
<p>I’m very lucky never to have experienced discrimination because I’m a girl; the worst I’ve gotten is lots of sickly-sweet comments about how wonderful it is that a girl is going into math. (These people mean well, but it makes me really angry. Especially things like being invited to an “all-female science bowl” or getting a book on the history of women in mathematics as a book award at school.) But if I wanted to, there’s a lot I could be blaming on gender. Teachers grade unfairly, my ethical objections to dissection were dismissed as “squeamishness” despite having been involved in the fight for Massachusetts dissection choice legislation for several years, the administration is condescending, science/math awards go to guys I easily “beat” in classes, and I get really funny looks when I argue that male pronouns as general are grammatically correct 
I’ve just never run into a situation where an unfair decision was clearly based on gender. (Sometimes I worry about compensation in the other direction, like with Caltech admissions, but that’s another story.)</p>
<p>So–I think anyone here would stand up for himself if he were absolutely certain he hadn’t gotten a job based on unfair discrimination, and we’d support you in doing the same. The certainty is all anyone’s questioning, because it would make for a very angry and embarrassing situation if in the employer’s (perhaps irrational) mind the other guy was actually better qualified.</p>
<p>(//edit: while i was writing that, apparently everyone else said the same thing ^^)</p>