how do you make them fight each other? what do you do in events?
You can set them into Teams via events (OnBotSpawn - Bot - SetTeam - [ ]), and then put them into a minigame.
Friendly team fights Enemies.
Enemies fight friendlies and neutrals.
Neutrals don't fight (I think).
And put in a custom team and name it in the box, and that will fight any other different team.
Make sure you're in a minigame for them to start fighting. Haven't played around with Bots a lot, but I'm pretty sure this is how to do it.