You should give everyone respect and dignity, even if they don't. You don't have to accept their views or be nice to them but they deserve the same basic respect and dignity any human being does. Painting this picture of a group of people being beneath your group has historically not worked out in terrible ways. It's not a good or healthy response to political discourse and doing what they're doing has never been a valid justification. If you want to act like they do, then I'm not sure why you wouldn't be with them.