I've learned that one cannot put blame on people for being stupid if they are stupid. Now I am not summing entire character, just the conduct within the context I'm interacting with them.
Rather than putting blame on people, one should feel compassionate. Later in the years this perspective developed into something more. Now mainly due to studies of illiusion of free will and how mind works, but the prime kickstarter was here.
And many, I assume, can't even imagine how much energy is saved by not getting angry on people for things most would. Do I get frustrated? - yes. Do I get sad? - yes. But once you stop seeing people as someoen who can 'choose' how to behave rather than just being themselves it opens the foor for real compassion. Understanding that if I would change in place with that person atom for atom I would behave exactly the same.
Now this a bit overstretch, but first time I was exposed to this perspective was here. In this community. And I'm no an angry person like I was before, partly due to disco.