To me, after a deep thought and examination, I have to come to a conclusion that the most stupid, wicked, senseless person
on earth is "a religious extremist, bigot or fanatic".

This is a person who kills other people, also die for what he/she does not (deeply) know about but was told that "it is like this or like that".
This is a person who doesn't know one bit of what happens to him/her the next minute not to talk of his/her life after death.
This is a person who fights for what he feels created him/her, and that, what created him/her cannot fight for himself. He/she is stronger and wiser than his/her creator.

Please add yours.

the most stupid person on earth is the person that think GOD doesn't exist.

Op hope u no go vex if my answer na YOU?

CWC