Unfortunately one of the things that an up-and-coming vibrant city will bring are other things like snobs, yuppies, and shallow, provincial people out of touch with the world around them. Fortunately, most of those people stay away from the 'dangerous' inner-city and live in places like Highlands Ranch and Cherry Hills.
j/k. Hey, there are nice people and rude people everywhere. Fortunately in Denver, I run into the former much more frequently than the latter.