It was a mistake to try to negotiate with them.
Of course it was a mistake. This exact same sitation happened about two years ago with two members of PARU. They were both murdered after negotiations had taken place for their freedom.
At the time, the military did not believe the police side of the story. Now it has happened to them and they finally believe it.
As we all know, judging the situation in Iraq by media accounts leads to a completely distorted picture of what is happening there. This is even more true with the south of Thailand since a large percentage of the activities there are not reported in the press.
Saying that the Thai government, security forces, or Toxin are, "helpless, bound and unduly restrained by Western liberalism and political correctness" shows an extreme misunderstanding of what is happening here. If anything I would argue the exact opposite.