I generally live by the words "people suck." Then when you see such disgusting behavior as this, it is not surprising.
Even better though, is when you meet truly kind people, it is a surprise and pleasure to work with them.
Even better though, is when you meet truly kind people, it is a surprise and pleasure to work with them.
Also, "people suck" includes yourself, so you can think about it as a way to think about what you are saying and doing and see if it is up to a level of quality that you are comfortable with.