narrow minded people frustrates me!

Well i have recently felt that people in general think that all of them in some way have this divine gift of understanding other people and of understanding nature. when I was young the most frequent answer that i got for my weird questions was " God knows best" " you cant understand because you are young". Now things have changed now its " I am telling you cuz I know it" or " i can understand everybody I meet within seconds"

even though he or she doesnt have a clue about what that other person is thinking but nowadays everybody thinks of himself as some intellectual being blessed with this inner glow from nature which enables them to know the unknown. some times I wonder ig it is some kind of psychological disorder.