I seldom get angry anymore..
It isn't that people are stupid, they are as smart as their data set allows..
Don't think of other people's misgivings as a deliberate choice against what is correct/right..
Their actions only represent the most logical conclusion with respect "to them"..
So with respect to you, they are no different than a random occurance.
Just as you do not mentally torment yourself over having stepped in a puddle, it is also unwarranted to get worked up over others actions..