Ruining the place?

That's a matter of martial arts.

This is a kindergarten, so it's not as simple as causing trouble.

Kindergarten is a place where children go to school. These people rushed in with whatever they had, and it was by no means as simple as causing havoc.

This has escalated to violence.

When the kindergarten security guards saw that something was wrong, they immediately wanted to stop this group of people. However, these people had orders ...