The story gives few details but it seems to have a few different themes.

• One of the children reported being beaten. While still common in many cultures, corporal punishment of children is an indefensible practice that harms children's development. For that reason it is illegal in Sweden. The authorities had to react in some way. Given the information available the reaction seems extreme and needlessly aggressive though and it probability did a lot more harm than good. Although it is unacceptable for parents to hit their children many other more empathetic and more intelligent courses of action for ending it exists. Everyone involved would probably have been better off had the family received non-threatening and respectful information and counseling. If the parents suffer from depression and trauma and can't handle the children, a so-called "relief family" that helped shoulder some of the work without severing family ties could have been a good alternative. Forcibly removing children from their families is always a deeply traumatic experience for the child as well as the family. In extreme ​cases it can be least bad option but it is never a happy story.
• Once the state takes over the care for children, be it justifiable or not, it becomes responsible for keeping them safe and providing them with a healthy and nurturing environment. However in many cases this doesn't happen and the children experience neglect ranging from the emotional coldness that comes with caring for children because it's a job and not because you do it out of love to violence and sexual abuse. To make things worse often the system doesn't believe the children when they tell of abuse and many of the bureaucrats working there do so with a lazy defeatist mindset, the children are already fucked up, so why even make an effort?
• Government bureaucracies of the imperial core are systemically racist. Also in liberal poster child Sweden. Where a white family would have been allowed to keep their children, the Syrian family was subjected to the most far-reaching measures available.
• When a child is put in foster care, be it justifiable or not, placing it in a family that have alien culture and traditions, thereby effectively suppressing those of the child and cutting it off from its heritage in itself constitutes a form of abuse. At the very least foster parents should show the utmost effort to understand and enable the culture and traditions the child is used to.