Why is my brother like this?

[Seraphim67]

In highschool, my brother was bullied by a large group of popular "cool" students physically and verbally. The group also beat him up multiple times.

The majority of the students joined in the bullying. They also beat him up multiple times.

But another group of popular "cool" students are also the people that defended my brother.

Now that my brother has finished highschool 7 years ago, my brother hates highschool popular "cool" students but he hates the average highschool students far more than the popular "cool" students that bullied him.

Today, he doesn't forgive the highschool average students that joined in the bullying against him and is extremely hostile towards them.

How can I make my brother stop hating the highschool average students? Should I stop him from hating the highschool average students?

[Korasones]

Don't show weakness, your Brother has to learn how to battle these Bullies, in my time 1980's there were more Bullies than now, If your Brother learns how to Battle this now it will make him a Stronger man in the Future if he does not he will grow up to be a Victim of life... he just have to remember that you will not win all Battles but he will earn respect from other if he Stands his Ground.

[Iron_Man]

He should have done something about it. He was traumatized no wonder he’s upset.

[RoseySarah]

He won't stop you answered your own question!

He hates them and bullys

[Avicenna]

He should have gotten over it by now

[In_Trance]

Therapy would help