I smack my one year old daughter on the hand if she does something naughty. That is reasonable chastisement. Don't dare compare me to someone throwing a 3 year old against a wall.
I wasn't referring to parents who lightly smack their child when they "do something naughty". I was referring to parents who excuse themselves when beating children with belts or in the case of A v United Kingdom [1998] 27 EHRR 611 (look it up), where a nine year old boy was beaten with a cane and bruised severely by his step father. The jury found his step father innocent on the grounds of reasonable chastisement. The case was taken to the European Court of Human Rights who obviously found the UKs law had failed to provide adequate protection to the child from abuse and degrading treatment (Article 3 of the European Convention on Human Rights).
That's just one example, how many deaths do we see every year from parents abuse?
Since Sweden banned physical punishment to children in 1979 only 1 child has died at the hands of their parents in the last 20 years.