Well you see 3 years ago, I'd have thought the child was spoilt, thick, plain nasty, attention seeking or in need of decent parenting. Frankly, I didn't care for children too much - particularly not badly behaved little sugars.
That's my issue and I have learned now not to judge. Mainly because I have had the honour of being a step parent to a little boy with profound learning difficulties, communication disorder, social issues and who is on the autistic spectrum. But he looks completely normal (Ratter hit this one on the head).
This happened to me in July at my grandmother's 85th birthday party. The people on the next table decided that they saw it as their god given right to express a view on his "appalling" behaviour and our "inadequate" parenting offering ill informed advice. My response was suitably cutting and I hope they will never proffer such a judgemental and uninformed opinion in the future.
There are children of the like in the OP's opening thread - a lot of that IS due to parenting IMO. There are also children who have difficulties which no amount of parenting and support can ever alleviate.
My point is let us not judge until we have walked a mile in that person's shoes. I learned not to. So to those who say that a child is made by its parents, is, in some cases true - but not all.