Interesting theory by Mamet. From what I gather, Schindler's List is one of the incredibly rare attempts by Hollywood to create a genuinely accurate historical film, as opposed to the usual rubbish, and for that reason I disagree with him.
His overall point is a good one, but, I feel, wrongly applied in this specific instance. Had he named virtualy any of the other 'historical' Hollywood films, I think his case would have been inarguable.
The term 'Hollywood History' is not used as a running joke for no reason, after all <img src="/ubbthreads/images/graemlins/smile.gif" alt="" />