Heresy.. the word originates from the Greek “Hairesis” which means “taking / Chosing”.
It is an opinion of an individual that enters into conflict with an institutionalised though or belief system.
Really the word confirms relativity. It used to be punishable with death.
Now, though the word is not used to indicate those who are “guilty” of it, it is denigrated via the media, most likely. Or worse by the hostility of deeply embedded public “thought” or “opinion”. I put these two words in quotation marks because unfortunately the masses do not realise that their concept of right or wrong are generally indoctrinated.
A heretic is one who does not accept brainwashing and communicates his/her antithesis to the world.. that is, before getting caught.
It was considered a crime because it was a threat to institutions that could maintain a certain “order”. (again I use the brackets because the order was kept to their own benefit only, most of the times it occurred throughout history).
Shortly: Heresy = No mainstream dogmas