I think that the guy was not as much a terrrrist as a sick soul, that anyway it was not really one guy's trial, but the trial of 'all' the people who rejoiced at the fall of the towers; and that anyway, like in the drug war waged against pot smokers, the real facts don't matter very much. It's matter of adressing peoples' mythologies and sacrifying the ritual scapegoat. Even if the guy was deemed stupid enough by its own perverted masters to not have been used in the scheme of things.