I was in a situation where I encountered what definitely had a whiff of 'ew, poor people' about it. Diversity isn't without its challenges. When I advertise the room out I try to weed out the people who just can't deal with poor people period. However I'll take the people who will later have solid reasons for disliking certain poor people. But I digress a bit.
Coming from an impoverished American background and now being quite and unapologetically bourgie, I do meet other members of the middle class, raised that way, who have no patience or sympathy for the poor. Or maybe what I'm sensing is a lack of obligation to the poor, particularly when the poor people in question live in the same friggin neighborhood as you and you have to deal with them as people and not as an abstraction. The spirit of the dislike of the immediate poor seems to me to have the same air about it as the dislike of the rich for the simple fact that the rich are rich.