Just because you can't find an accommodation... you are now calling people usurpers? C'mon man! Seriously? Is it not possible that they simply want to deal with their own kind for easier negotiation or for preference? I have been in your shoes and I don't think its really hard to find an accommodation if you are patient enough. I have seen a lot who wants to give the accommodation to a specific group. So I respect it and move on. I think that's what you should do too. Just chill and eventually you will get your own place to live.