[Serious] You should FEEL BAD because you disagree with me

[Catharsis]

Suppose you're talking about some philosophical point. Maybe the definition of a word, or the quality of some piece of evidence. 

I can understand debating that more or less endlessly. People disagree, and this is good, because our thinking can only progress through discussion and dialectic. 

However, some people join those discussions solely trying to make other people feel bad. They type things without arguments, for the sole purpose of hurting someone else's feelings. 

I have never understood this.

For those on the receiving end: has this ever changed your mind? 

For those who do it: what is your goal?

That's called jealousy.