I disagree. This kid was a snot right from the FIRST time the Twitty's asked him a few questions. His attitude stunk. And then the father jumped in and said "This isn't America, Joran You say Nothing"!! This 17 year old boy knew he would be supported by his father REGARDLESS of whether he was wrong. And why do you say this HOSTIILE group? They didn't start out hostile. They simply wanted the boy to help them with some answers. It BECAME hostile but not because of Natalee's family.
I just think that showing up at a family's home at 3:00 AM making demands did nothing but create hostility, it certainly did not help find Natalee. However, going to the family home at 8:00 AM and asking a few smart questions may have been less aggressive and netted better results.