Arrogant self righteousness. Because these people think that they are better than everyone else, they tend to have the following qualities.
1) Judgmentailsm - The are free to condemn others because they feel they are superior. When you think you are better than everyone else, bigotry, condescension, and prejudice are not far behind.
2) Insensitivity - Because they think that everyone should be able to be like them, they have no sense of kindness or sympathy when people fail. When insensitivity turns active, it becomes cruelty. They are SELF-righteous, they have a standard in their own mind that they have met. As a result, everyone who isn't as perfect as they are is a loser. (And I think that using the word loser is a nice way of putting it.)
3) Nasty speech - Arrogant people don't listen to others and don't care about them. Remember that the base principle of arrogant self-righteousness, is that if you were like me, you wouldn't be such a loser. This gives the arrogant person the mental freedom to lie, gossip, and make up their own truth. They will say anything to make sure that their public image is always perfect.
4) Uncaring - Arrogant people ultimately live only for themselves and they don't care about anyone else. It is interesting that self-righteous people are more concerned about blame and punishment than about the fact that frankly, people are weak and make mistakes. A self-righteous person can't comprehend what to do about someone who is weak.
And, so that I will not condemn myself as arrogant and self-righteous, yes, I admit, some very specific people come to mind when I ponder this question. And since they are arrogant and self-righteous, obviously, I am better than they are. Oops! For the record, I pray for these people regularly, and I pray that I will be humble.