The key is to act in a professional manner whatever your views of a person or group are.
Of course you're entitled to your own views, regardless of how ignorant they are. And yes, professionalism involves occasionally putting your beliefs to one side - we all have prejudices whether we like it or not.
...does not mean snivelling and scraping to avoid offending someone's cultural sensibilities.
Nobody, least not BA, would expect you to do that. What you are expected to be able to do is demonstrate some key qualities like empathy, social awareness and, for want of a better word, manners.
It's for those in a minority to fit in with the majority
Well luckily for BA, the majority of people there are aware of differences among us and recognise that it is a strength. The best workplaces are the ones where everyone comes to work not being embarrassed of who they are or where they come from.