Definition: Given a real-life anecdote of a complex ethical situation, generate a suitable title that describes the main event/root cause of the situation. Imagine that the given text is a social media post, and you have to write the title of the post, so the users can decide to read the main text or not.
Input: Alright, here’s the long story short: this friend of mine insulted my other friends, who he has literally never talked to (called them sluts and other stuff) as well as insulted me (calling me “ugly” which personally I don’t really care for, just thought to include it). Of course, I found this really rude but didn’t tell him off until later.

But the reason I’m wondering if I’m the asshole is because of the following reasons:

-I called him “fat” and “ugly” back (what else was I supposed to do?)
-He apparently has trouble being social. According to his mom, he doesn’t know how to properly have friends and has only hung out with his older cousins. From that, he only knows how to insult and complain. At least, that’s coming from his mom. He seems REAL social at school. 

But I told him off for it real harsh. AITA for telling him off?

tl;dr:
Anti-social friend with people issues insulted my other friends and I got mad at him for it.

telling my friend off