The selfish folks I know are all liberals.
I do know a few liberals who are not selfish - they are actually good folks, just brainwashed by the NPR/NYT/WaPo crap they listen to/read.
Yes, the really bad ones are the ones with no gratitude, as the video points out. I have noticed that many young people have no gratitude — instead they feel they are entitled to a good job, even if their degree is in ‘gender studies’ or some other impractical field.