blah blah blah........
Too many assumptions here, seriously. Just because those parents wear different clothes to you and to others, you've started assuming that they must be following the rule of no disciplining until 7.
Giving love until the age of 7 means, showing no anger to kids nor beating them nor forcing them to do anything but directing them towards it with what amuses their mind, in kindergartens there should be lots of unstructured play for children rather than forcing them not to sit, stand, speak, wee until they're told.
And this is what most schools do in Europe [unstructured play until they're seven] except Britain and those kids are much better at learning and behaving than others. Britain is following a totally different rule may be following USA by taking exams from 6 years old.
And that boy in your son's class, probably he doesn't get enough love from his parents, probably he doesn't want to go to schoool, probably he's bored, probably he's being bullied and being mocked by other kids in his class because he's different from them, probably he's finding it hard to settle down in new country among new people........there's so many factors you can think of.
First, when I said that the family is "kind of" new to the country, that means they've been here a few years. Their son was too young to remember the country in which he was born. The parents do not wear different clothes, they look just like any other parent at school. I spoke with them a few times while waiting for school to get out, otherwise I'd not know these extra details.
The boy did not get bullied, he actually was a bully himself - which is the reason for him getting sent home a few times. Our school district has a "zero tolerance" policy about bulllying.
Perhaps he doesnt get enough love at home but the mother appeared to be a very loving mom the times I saw her at school. Couldnt read the father. I did overhear the teacher talking to them one time telling them that he needs to learn structure, needs to learn respect and how to listen. My son told me the types of things that the boy would do - stand on top of tables and throw toys, take a paint-loaded paintbrush and paint other kids clothes or faces (this actually happened to my son twice), take toys away from other kids during free time. All kids can do naughty things from time to time. But when told to stop, this kid would defiantly answer "no".
So....who is making assumptions here?
The only assumption I made here IMHO is that he gets insufficient structure and discipline at home, because thats how it looks to me. And I think its a pretty fair assumption. Structure is actually a form of discipline. And I imagine that a child without either structure or discipline would be just like that boy. Anyway, thats why I thought the parents may be following the "7 year" rule because otherwise why would they let their kid behave this way.