I have the power to make everyone in my class dislike one another.
Why would you ever want to do something like this intentionally anyway?
I want to cause problems between them by telling them that they hate each other.
I understand that you may want to stir things up because you're bored, but pitting your classmates against each other is not appropriate. You need to think about others and not cause trouble between others because it's wrong and unethical.
I'm bored!
Just because you are bored does not mean that you should mess with people like this. Instead, you could use your time to do something nice for people instead!