I'm gonna ramble a bit.
What I got from this is basically we have a mistaken idea of "discrimination". Yes, she's a monster, but admitting that fact doesn't necessarily mean you're discriminating her. You're just accepting who she is. In this case, trying to change her into someone who fits the "standard" is no use, mainly because her trait is going to stay anyway, it's part of her. We're all different, what's wrong about that?
Of course, ignoring her is not good, but it's better than using her as a toy and a tool to say "oh, we are such nice people". Let's admit it, acting different around her (anyone who we perceive as different) at first is unavoidable. However, that doesn't mean people can't change their behaviour over time and get used to her and eventually accept her as she is.
Nevertheless, what bugs me the most is the fact that she never said a word except for the "thank you" in the last panel. That really says a lot about the situation...
By the way, I agree with that guy, discrimination is never going to disappear but maybe not because of the reason he mentioned