The writer is an attorney who lays out how the trial will inevitably play out. I think he's exactly right. We've seen this already in the trial of Zacharias Moussoui (however it's spelled), the alleged 20th hijacker. In short it will be a massive media circus, cost incredible amounts of money, give the confessed terrorists an international platform and publicity, and require that the U.S. disclose our secret intelligence gathering techniques. Not to mention setting the defense attorneys up for life financially, and ruining the reputation of the U.S. legal system.
He also speculates on the President's motivations for bringing the trials here, and concludes that it is part of a sinister left-wing plot. On that point I think he gives President Obama too much credit. A plot requires competence and planning. I'm not sure it's a plot, so much as just plain stupidity, naivete, and a fundamental misunderstanding of the world and of human nature coupled with a disdain for any policy or measure enacted by President Bush.
I never thought I'd say this, but I'd rather see them tried at the International Criminal Court. It's reputation has no where to go but up, and when the terrorists are all freed, it would help cement public opinion against international institutions, and strengthen faith in America. All the opposite outcomes of a trial in NYC.