Chamberlain was embedded with the Americans. He quoted them. He did not put his own opinions into the piece. Indeed, one of the chilling things about it was that there was virtually no analysis of the situation, just one line pointing out the differences in UK and US approaches. The carelessness and aggression in targetting came out in the words of the US airmen themselves. Since he was embedded with them they will no doubt have been reading his copy on the internet, it seems unlikely he will have misquoted them. They were frankly damned with their own words. That sort of attitude and behaviour is not going to win us any friends in Afghanistan, indeed it has already lost the Americans friends across large tracts of southern and eastern Afghanistan. Now they have come onto our patch using the same methods. The ordinary Afghan will not differentiate between UK and US forces. The attitude exhibited by the US airmen in that article was disgraceful and will only ensure failure for coalition forces in Afghanistan.
As for what was the point of that article. It is his job to report what is going on. He did that. Maybe, just maybe, someone will have read it and maybe, just maybe, things will be moderated. If they aren't we might as well pull out now.