That's terrible.

Is it entirely on the school, though? I am in Japan, so I can't say for sure, but my siblings in Indiana say that kids are still expelled there if they hurt another kid or act up.

Parents deserve a lot of the responsibility. Back in the day it seems like parents yelled at kids for bad behavior at school, whereas these days they curse at the school and tell their child not to worry about it because all the teachers are idiots. A lot of this teaching of no respect comes from home.