Why do they even have to bully?

Bullies are insecure, and bully because it make them feel powerful. The best way to combat them is to not give them the reaction they crave.

bullying is terrible, they feel they have to release feelings because they might've been bullied before

Bullying can come from many different reasons from jealousy, peer pressure or even their growing environment. There could be one reason or many but every person may have a cause for their actions; but not all may be the same reason.

Because they struggled a lot in their life, they are insecure and have darker pasts and they think that if they hurt others, it is going to make them feel better

Because they are bored of their own existence, they failed in their life, they have too much anger in their veins and they don't know what to do with it, they are trying to keep on eye, their popularity is kinda their life, they don't have anything else, in the end they are just losers who will be punished by someone bigger than them

People usually bully when they're jealous, or are going through something at home. Maybe they're the weakest link at home, and need a way to feel superior in some sort of way. Maybe they're jealous of you and feel like making you feel bad about yourself so they no longer feel the need to be jealous. In the end, there is no justifiable reason to bully, but these are usually the case when it comes to bullies.

Sometimes the bullies themselves are going through some personal stuff of their own. They may be having some problems at home like not getting enough attention from their family or an loved one has passed away that meant a lot to them and they are letting it out on others or they were not taught how to treat other people! Sometimes the bully is being bullied too.

Bullying is done by people who feel weak in other aspects of their lives and feel the need to bring down others so that they can exercise authority and feel powerful again. Do not let bullying to get to you as all they are saying is out of anger and frustration of their own. Bullying is THEIR PROBLEM, don't let them make you toxic. If it gets too bad, please seek help and inform higher authorities as it is a serious issue. Keep well and don't let the haters affect you :)

They 'bully' because they find something wrong with in them self's or sometimes they have a rough home life.

people often are bullies because they've been bullied/abused themselves, or they do it just to make themselves feel better or to be "accepted"