Why are kind-hearted students easy to be school bullying?

It doesn't necessarily mean that kind-hearted students are easy to be bullied on campus. It can be said that some kind students may help those bullied people because they see them bullying others, and then those bullied people will want to bully them, because they are not the same kind of people, and she will not look on coldly, so such people must bully her and then bully her on campus, so that those people can get pleasure and satisfaction. The feeling of a winner. And I think it's easy to be bullied, or maybe it's because they are weak and have never really resisted those bullying school bullying. So it doesn't mean that good-hearted students are easy to be bullied on campus.