I wouldn't say there's bickering? Honestly, this whole thread reads to me as mums who believe weaning at 6 months is best for numerous medical reasons and mums who wean pre-6 months are taking offence.
I'm sure there are links for both sides of the argument if one looked hard enough.
I also don't see anyone being judgemental. As I said in my previous post, I don't understand or agree with weaning before 6 months because I wouldn't take the risk of my child's digestive system not being ready. But that is my opinion on how I want to wean my child. Others may feel that the risk is negligible based on their own child's behaviour.
Personally I think when one gets defensive over a decision, one knows that perhaps that decision is the wrong one for whatever reason. For example, I got defensive over ffing ds1 because I felt it was the wrong decision even though it was the best decision at the time. Others may disagree but that's ok, we don't all have to agree all the time!