Two issues with the idea of a 1:1 support.
- Who is going to pay for this 1:1 support?
- where are they going to get this member of staff from?
Where I work, there is a serious issue with recruitment. Staff have realised they can earn a lot more money for a lot less hassle working in a shop or supermarket.
Secondly, the Nursery can't "refuse to take him" - they have to work within the laws of the country and not discriminate against anyone.
Plus, of course, (and I know nothing about this particular child, but) many of the children who are aggressive have come from homes where the parents are really struggling with parenting. By the children being in Nurseries for a year, or 2, or 3 before they get to school, with professionals who have experience of working both with dc with SEND and dc who are damaged, or traumatised by their lives so far, it can have a really, really positive impact on the behaviour before they get to school - when they will have to attend in far greater child: adult rations, and of course they will be bigger, stronger, and their behaviour will be more ingrained. If there were a choice, it is exactly these damaged children who should be the ones in Nursery for a greater number of hours a week, rather than those who have already learned how to share, and how to handle their emotions.
When exactly is "years ago" ? (from this post).
Teachers have always worked with damaged children and children with SEND. Of course, PVIs are not, on the whole, staffed by trained teachers.