Re: Now that was crystal clear.
Sarcasm is inherently cruel, it's intent is not just to persuade, or to refute, it is to humiliate. It is wielded by those with no empathy, who enjoy watching the pain of others, and who feel they deserve that pain because they are weak and
cowardly or foolish. They are inferior, or evil, so they must suffer for that. And it does require some wit to be applied effectively, so it also serves the vanity of the user.
I know, everybody uses it occasionally, none of us is a saint. And sometimes the victims actually deserve it. But it is primarily the tool of the bully.
Introspective enough for you?