That's where we disagree. Raising kids is the responsibility of parents. If parents don't want that responsibility then they shouldn't have kids. The schools have enough to deal with educating them and still managing to do a very good job of spotting problems that the parents are unaware of (and often disagree with) or spotting that the problem is the parents themselves. Yes, schools do show them some kind of social awareness, but they should be half decent human beings before they turn up on their first day - if the parents have been doing their job.
It's really too easy for a lot of parents to shirk their obligations and just foist it all off onto schools.
That's one of the reasons they go to school.
They go to school for many reasons, but teachers are not trained psychologists so cannot be expected to spot these problems in every child.
The school is at fault for not providing a safe learning environment,
Again, if you start to frisk and x-ray every kid who comes into the school then folk start getting at the school for infringing the children's rights.
my experience is that teachers look the other way, rather then to intervine
That is your experience. In mine, a kid gets whisked off to some assessment centre as soon as he looks at someone cross-eyed.