It is very poor wording but the reality is that no school can guarantee complete control of a class. They can put things in place to reduce a possibility of problems arising, but they can never guarantee a child will never dysregulate in a class and I would worry if a school said they could guarantee that.
Can we all hand on heart say our child has never misbehaved, never got upset and lashed out?
Now, some of the things the OP has said has happened in the class are worrying and I would hope measures were being put in place, but when funding is so tight and numbers of children with SEN being shoehorned into the current education system which doesn't suit some of them, it is a complete nightmare. For a child to be removed from school, schools have to show they have done everything they can before this action is taken, especially if SEN is involved.
So I would be asking what they are doing to safeguard the children. If they shrug their shoulders and say as we can't guarantee control so we aren't doing anything, if they are excusing violence by saying it was a falling foot, that certainly isn't good enough. But if they give examples of what they are doing, to say prevent triggers of this behaviour, extra supervision etc then work with the school.
Was the report from the Chair of Governors following a complaint going through the complaints policy?