Well, I am pretty sure it is White Brit kids that are doing this. I seriously doubt that this would happen in a Brit/Asian/African etc, household.
Parents need to get off their asses and actually BE a proper parent...otherwise do not have kids...simple.
What I have seen how some kids behave towards their parents, makes my hair stand up...if my child would even display just a whiff of that kind of thing (my child never has though), that child would regret that very fast. For sure.
But, it's the parent's fault, not the kids.

Mind you, here I have seen boys hit their mothers too....and those where not white people.