A child in my son's class started bullying another (DS inadvertently got dragged into it). This child became fixated with the other. At one point he was saying things like how he wanted to sacrifice the other and on one occasion went into school having made up a song about how every day he wanted to kill this child. He also physically hurting a number of the other children on a regular basis in addition to his main target.
We reported everything that came up and DS was telling us.
Parents are affluent, generally likeable but feckless. And very middle class and pushy. They pushed back against everything school said. Eventually social services were involved, in no small part down to how hard we pushed back and supported another family through it.
Its gone on for over two years and only recently seems to have massively calmed down. (I've been told by a third party he's now on medication).
It is terrifying. It's not normal for kids at primary age or even secondary age to be saying and doing these things.
I am hoping that the right interventions are in place, but why a 6/7 year old was getting this all from deeply troubles me. I still think more could be done to help him and the parents.
The whole class has ended up with lessons on relationships and managing feelings and conflict because it was starting to suck others into his pattern of behaviour.
I do not think for a second it's an isolated case (especially given my location either).
I think from what school staff are saying it's becoming scarily common.