I think the key difference is that I grew up in the North. I can't speak on what everyone did but my conservative friends and any conservative relatives of my friend group were acceptable if not very generous with their tip. In any case, I know this is how politics goes but generalizing your ideological opposition as the scum of the earth isn't terribly productive or insightful. However, the people you grew up around sound pretty bad and your criticisms of them are much more justified.